organic compounds
(5S)-4-(2,2-Dimethylpropyl)-5-isopropyl-1,3,4-oxadiazinan-2-one
aCB 4160, Department of Chemistry, Illinois State University, Normal, IL 61790, USA
*Correspondence e-mail: Ferrence@IllinoisState.edu
The title compound, C11H22N2O2, has one chiral center and packs in the monoclinic P21. The has five crystallographically independent molecules, four of which engage in intermolecular N—H⋯O hydrogen bonding.
Related literature
For related structures and background, see: Addison et al. (2008); Anderson et al. (2006); Burgeson et al. (2004); Casper et al. (2002); Rodrigues et al. (2006); Szczepura et al. (2004); Trepanier et al. (1968). The synthesis of the title compound is described by Casper et al. (2004). For literature related to crystallographic analysis, see: Allen (2002); Bernstein et al. (1995); Boeyens (1978); Bruno et al. (2004); Cremer & Pople (1975); Etter et al. (1990); Macrae et al. (2008); Spek (2009).
Experimental
Crystal data
|
Refinement
|
Data collection: SMART (Bruker, 1999); cell SAINT (Bruker, 1999); data reduction: SAINT; program(s) used to solve structure: SIR2004 (Burla et al., 2005); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999), publCIF (Westrip, 2010) and Mercury (Macrae et al., 2008).
Supporting information
https://doi.org/10.1107/S1600536810048798/zl2318sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810048798/zl2318Isup2.hkl
The title compound was prepared as previously reported (Casper et al. 2004). Single crystals were grown by vapor diffusion of hexane into an ethyl acetate solution of the title compound.
All non-H atoms were refined anisotropically. All H atoms were initially identified through difference Fourier syntheses then removed and included in the
in the riding-model approximation (C–H = 0.98, 0.99 and 1.00 Å for CH3, CH2, and CH; Uiso(H) = 1.2Ueq(C) except for methyl groups, where Uiso(H) = 1.5Ueq(C)).The fundamental structure of 1,3,4-oxadiazinan-2-one compounds has been known for nearly forty years (Trepanier et al., 1968). We are interested in studying the underlying factors for differing conformations of this heterocycle and for its use as a chiral auxiliary in aldol addition reactions (Casper et al., 2002; Burgeson et al., 2004).
The oxadiazinanone ring is well suited to accommodate H-bonded dimers of the R22(8) type (Bernstein et al., 1995; Etter et al., 1990). The H-bond occurs most naturally between the carbonyl oxygen on the first molecule and the nitrogen containing the hydrogen atom on the second molecule, and vice versa. The result is an eight-membered ring in which two of the connections are H-bonds. These H-bonded dimers have a strong propensity to form in the oxadiazinanone system (Anderson et al., 2006). A few examples of this type of H-bonding are seen in structures by Addison et al. (2008), Rodrigues et al. (2006), and Szczepura et al. (2004) (with REFCODES LOBVII, GEGZUO, and YAGJEW, respectively).
The title compound packs into a monoclinic, P21,
This compound is unusual in that there are five molecules in the (see Figure 1). The best of these is illustrated in Figure 2. Of these five molecules, two pairs are engaged in R22(8) type H-bonding. The fifth molecule does not engage in H-bonding because the donor atom is surrounded by neopentyl substituents, effectively blocking any H-bonds to an acceptor atom. Figure 3 shows all five molecules in a wireframe style, with key atoms shown in a space-fill style, to highlight how the N—H is hemmed in by neopentyl substituents. Another, interactive, view in Figure 4 shows how inaccessible the donor N really is.The number of crystallographically independent molecules in the
also warrants notice. Most of the structures in the Cambridge Structural Database have a Z' less than or equal to 1. According to the August 2010 edition of the CSD (Allen, 2002), 91.1% of the structures have a Z' less than or equal to 1. As Z' increases, the percentage of structures decreases (Z'=2, 7.7%; Z'=3, 0.42%; Z'=4, 0.40%). Only 0.014% (N=73) of structures in the CSD have a Z'=5, which is a property of this structure.Since the conformation of the heterocycle is of some interest, structure overlays were conducted in Mercury (Macrae et al., 2008). Surprisingly, all five heterocycles exhibit the same conformation (seen in Figure 5); there is some swing observed in the isopropyl and neopentyl groups, but that deviation does not require the heterocycle to assume a different position in the crystal array. A Cremer-Pople ring analysis (Cremer & Pople, 1975; Boeyens, 1978), performed in PLATON (Spek, 2009), shows that all five molecules exhibit the 5E ring conformation, which is an θ=56.7 (5)°; Φ=251.2 (5)°, Ring 2 (O21—C26) - Q=0.499 (4); θ=53.7 (5)°; Φ=253.9 (5)°, Ring 3 (O41—C46) - Q=0.510 (4); θ=56.7 (4)°; Φ=246.5 (5)°, Ring 4 (O61—C66) - Q=0.492 (5); θ=55.6 (5)°; Φ=239.9 (6)°, Ring 5 (O81—C86) - Q=0.500 (4); θ=55.9 (5)°; Φ=236.4 (5)°.
with C5 as the flap apex. The data for the five oxadiazinanone rings are as follows: Ring 1 (O1—C6) - Q=0.511 (4);Upon conducting a Mogul geometry check (Bruno et al., 2004), the N4—C10 (1.490 (5) Å) and N24—C30 bonds (1.488 (5) Å) were flagged as being outside the typical range for a C—N bond (mean 1.46 ±0.01 Å). This bond is the one between the N atom of the heterocycle and the neopentyl substituent. This bond in the other three crystallographically independent molecules is not flagged. The bonds C50—C51 (1.508 (7) Å) and C90—C91 (1.507 (6) Å) were also flagged as unusual compared to the mean of 1.54 ±0.01 Å. One last bond, N84—C85, was considered unusual with a value of 1.463 (5) Å versus a mean of 1.49 ±0.01 Å. There is no obvious particular chemical or crystallographic explanation for these deviations. However, they still appear to be within an acceptable range. All angles were reported to be within normal limits.
For related structures and background, see: Addison et al. (2008); Anderson et al. (2006); Burgeson et al. (2004); Casper et al. (2002); Rodrigues et al. (2006); Szczepura et al. (2004); Trepanier et al. (1968). The synthesis of the title compound is described by Casper et al. (2004). For literature related to crystallographic analysis, see: Allen (2002); Bernstein et al. (1995); Boeyens (1978); Bruno et al. (2004); Cremer & Pople (1975); Etter et al. (1990); Macrae et al. (2008); Spek (2009).
Data collection: SMART (Bruker, 1999); cell
SAINT (Bruker, 1999); data reduction: SAINT (Bruker, 1999); program(s) used to solve structure: SIR2004 (Burla et al., 2005); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999), publCIF (Westrip, 2010) and Mercury (Macrae et al., 2008).C11H22N2O2 | F(000) = 1180 |
Mr = 214.3 | Dx = 1.086 Mg m−3 |
Monoclinic, P21 | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P 2yb | Cell parameters from 6729 reflections |
a = 17.0330 (18) Å | θ = 2.4–22.8° |
b = 11.2270 (12) Å | µ = 0.08 mm−1 |
c = 17.404 (2) Å | T = 193 K |
β = 100.073 (2)° | Prism, colourless |
V = 3276.9 (6) Å3 | 0.6 × 0.32 × 0.27 mm |
Z = 10 |
Bruker P4/R4/SMART 1000 CCD diffractometer | 4526 reflections with I > 2σ(I) |
ω scans | Rint = 0.044 |
Absorption correction: multi-scan (SADABS in SAINT-Plus; Bruker, 1999) | θmax = 26.4°, θmin = 1.2° |
Tmin = 0.812, Tmax = 0.943 | h = −21→21 |
16431 measured reflections | k = −11→14 |
7042 independent reflections | l = −19→21 |
Refinement on F2 | 1 restraint |
Least-squares matrix: full | H atoms treated by a mixture of independent and constrained refinement |
R[F2 > 2σ(F2)] = 0.052 | w = 1/[σ2(Fo2) + (0.0763P)2] where P = (Fo2 + 2Fc2)/3 |
wR(F2) = 0.144 | (Δ/σ)max < 0.001 |
S = 1.03 | Δρmax = 0.27 e Å−3 |
7042 reflections | Δρmin = −0.17 e Å−3 |
723 parameters |
C11H22N2O2 | V = 3276.9 (6) Å3 |
Mr = 214.3 | Z = 10 |
Monoclinic, P21 | Mo Kα radiation |
a = 17.0330 (18) Å | µ = 0.08 mm−1 |
b = 11.2270 (12) Å | T = 193 K |
c = 17.404 (2) Å | 0.6 × 0.32 × 0.27 mm |
β = 100.073 (2)° |
Bruker P4/R4/SMART 1000 CCD diffractometer | 7042 independent reflections |
Absorption correction: multi-scan (SADABS in SAINT-Plus; Bruker, 1999) | 4526 reflections with I > 2σ(I) |
Tmin = 0.812, Tmax = 0.943 | Rint = 0.044 |
16431 measured reflections |
R[F2 > 2σ(F2)] = 0.052 | 1 restraint |
wR(F2) = 0.144 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.03 | Δρmax = 0.27 e Å−3 |
7042 reflections | Δρmin = −0.17 e Å−3 |
723 parameters |
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes. |
x | y | z | Uiso*/Ueq | Occ. (<1) | |
O1 | 0.4885 (2) | 0.4683 (3) | −0.06758 (17) | 0.0693 (9) | |
C2 | 0.4247 (3) | 0.4157 (5) | −0.0465 (3) | 0.0679 (13) | |
N3 | 0.4016 (2) | 0.4554 (4) | 0.0188 (3) | 0.0625 (10) | |
N4 | 0.44061 (17) | 0.5387 (3) | 0.07359 (18) | 0.0427 (7) | |
C5 | 0.5244 (2) | 0.5438 (3) | 0.0642 (2) | 0.0418 (9) | |
H5 | 0.5489 | 0.6146 | 0.0941 | 0.05* | |
C6 | 0.5273 (3) | 0.5655 (4) | −0.0204 (2) | 0.0585 (11) | |
H6A | 0.5 | 0.6414 | −0.0373 | 0.07* | |
H6B | 0.5834 | 0.572 | −0.0278 | 0.07* | |
C7 | 0.5696 (2) | 0.4339 (4) | 0.0995 (2) | 0.0472 (9) | |
H7 | 0.5419 | 0.3622 | 0.0737 | 0.057* | |
C8 | 0.6560 (2) | 0.4309 (5) | 0.0861 (3) | 0.0677 (13) | |
H8A | 0.6821 | 0.3586 | 0.1096 | 0.102* | |
H8B | 0.6845 | 0.5011 | 0.1102 | 0.102* | |
H8C | 0.6568 | 0.4311 | 0.0299 | 0.102* | |
C9 | 0.5678 (3) | 0.4252 (5) | 0.1864 (3) | 0.0690 (13) | |
H9A | 0.597 | 0.3539 | 0.2078 | 0.103* | |
H9B | 0.5124 | 0.4199 | 0.1945 | 0.103* | |
H9C | 0.5929 | 0.4961 | 0.213 | 0.103* | |
C10 | 0.3986 (2) | 0.6556 (3) | 0.0666 (2) | 0.0505 (10) | |
H10A | 0.3527 | 0.6517 | 0.023 | 0.061* | |
H10B | 0.4354 | 0.7179 | 0.0539 | 0.061* | |
C11 | 0.3688 (2) | 0.6901 (3) | 0.1414 (2) | 0.0443 (9) | |
C12 | 0.3260 (3) | 0.8094 (4) | 0.1264 (3) | 0.0634 (12) | |
H12A | 0.2807 | 0.8009 | 0.0834 | 0.095* | |
H12B | 0.3631 | 0.8691 | 0.1124 | 0.095* | |
H12C | 0.3067 | 0.835 | 0.1736 | 0.095* | |
C13 | 0.3113 (3) | 0.5967 (4) | 0.1610 (3) | 0.0792 (15) | |
H13A | 0.2668 | 0.5885 | 0.1174 | 0.119* | |
H13B | 0.291 | 0.6209 | 0.208 | 0.119* | |
H13C | 0.3391 | 0.5202 | 0.1705 | 0.119* | |
C14 | 0.4384 (3) | 0.7049 (5) | 0.2076 (3) | 0.0706 (13) | |
H14A | 0.4751 | 0.7651 | 0.1934 | 0.106* | |
H14B | 0.4665 | 0.6288 | 0.2175 | 0.106* | |
H14C | 0.4189 | 0.7304 | 0.2547 | 0.106* | |
O15 | 0.3927 (2) | 0.3348 (4) | −0.0854 (3) | 0.1060 (15) | |
H3 | 0.365 (3) | 0.416 (5) | 0.035 (3) | 0.073 (16)* | |
O21 | 0.60240 (16) | 0.0228 (3) | 0.35395 (17) | 0.0629 (8) | |
C22 | 0.6241 (2) | 0.0932 (4) | 0.4166 (2) | 0.0528 (11) | |
N23 | 0.56820 (19) | 0.1295 (3) | 0.4561 (2) | 0.0483 (9) | |
N24 | 0.48479 (16) | 0.1070 (3) | 0.43763 (17) | 0.0439 (7) | |
C25 | 0.4650 (2) | 0.0769 (4) | 0.3543 (2) | 0.0477 (10) | |
H25 | 0.4099 | 0.0429 | 0.3446 | 0.057* | |
C26 | 0.5212 (2) | −0.0197 (4) | 0.3368 (3) | 0.0602 (11) | |
H26A | 0.5153 | −0.091 | 0.3688 | 0.072* | |
H26B | 0.5077 | −0.0425 | 0.2811 | 0.072* | |
C27 | 0.4643 (2) | 0.1884 (4) | 0.3030 (2) | 0.0557 (10) | |
H27 | 0.519 | 0.2241 | 0.3128 | 0.067* | |
C28 | 0.4435 (3) | 0.1552 (6) | 0.2171 (3) | 0.0893 (17) | |
H28A | 0.4816 | 0.0958 | 0.2047 | 0.134* | |
H28B | 0.4461 | 0.2264 | 0.185 | 0.134* | |
H28C | 0.3895 | 0.122 | 0.2061 | 0.134* | |
C29 | 0.4062 (3) | 0.2798 (5) | 0.3235 (3) | 0.0782 (14) | |
H29A | 0.4067 | 0.3501 | 0.2902 | 0.117* | |
H29B | 0.4217 | 0.3029 | 0.3783 | 0.117* | |
H29C | 0.3524 | 0.2456 | 0.3152 | 0.117* | |
C30 | 0.4607 (3) | 0.0152 (4) | 0.4906 (3) | 0.0594 (11) | |
H30A | 0.5086 | −0.0121 | 0.527 | 0.071* | |
H30B | 0.4383 | −0.0543 | 0.4592 | 0.071* | |
C31 | 0.3996 (2) | 0.0603 (4) | 0.5375 (2) | 0.0539 (11) | |
C32 | 0.3795 (3) | −0.0402 (6) | 0.5887 (3) | 0.0896 (17) | |
H32A | 0.4276 | −0.0641 | 0.625 | 0.134* | |
H32B | 0.359 | −0.1083 | 0.556 | 0.134* | |
H32C | 0.3388 | −0.0133 | 0.6183 | 0.134* | |
C33 | 0.4337 (4) | 0.1663 (6) | 0.5866 (3) | 0.115 (3) | |
H33A | 0.4822 | 0.142 | 0.6221 | 0.172* | |
H33B | 0.3943 | 0.1952 | 0.6171 | 0.172* | |
H33C | 0.4465 | 0.2301 | 0.5524 | 0.172* | |
C34 | 0.3249 (3) | 0.0960 (5) | 0.4830 (3) | 0.0831 (16) | |
H34A | 0.3368 | 0.1618 | 0.4499 | 0.125* | |
H34B | 0.2846 | 0.1215 | 0.5134 | 0.125* | |
H34C | 0.3046 | 0.0279 | 0.4502 | 0.125* | |
O35 | 0.69335 (16) | 0.1255 (4) | 0.43234 (17) | 0.0761 (10) | |
H23 | 0.584 (2) | 0.169 (4) | 0.492 (3) | 0.051 (13)* | |
O41 | 0.26808 (14) | 0.8230 (3) | 0.31233 (16) | 0.0557 (7) | |
C42 | 0.2958 (2) | 0.7617 (4) | 0.3774 (2) | 0.0442 (9) | |
N43 | 0.24610 (18) | 0.6941 (3) | 0.4097 (2) | 0.0474 (8) | |
N44 | 0.16241 (17) | 0.6874 (3) | 0.38521 (18) | 0.0481 (8) | |
C45 | 0.1355 (2) | 0.7981 (4) | 0.3434 (2) | 0.0526 (11) | |
H45 | 0.0787 | 0.7861 | 0.3181 | 0.063* | |
C46 | 0.1835 (2) | 0.8159 (5) | 0.2790 (2) | 0.0596 (11) | |
H46A | 0.1741 | 0.7486 | 0.2418 | 0.071* | |
H46B | 0.1664 | 0.8902 | 0.2502 | 0.071* | |
C47 | 0.1371 (2) | 0.9001 (4) | 0.4006 (3) | 0.0637 (12) | |
H47 | 0.193 | 0.9072 | 0.4297 | 0.076* | |
C48 | 0.1156 (5) | 1.0160 (7) | 0.3609 (5) | 0.134 (3) | |
H48A | 0.1172 | 1.079 | 0.4001 | 0.201* | |
H48B | 0.0617 | 1.0109 | 0.3301 | 0.201* | |
H48C | 0.1536 | 1.0345 | 0.3264 | 0.201* | |
C49 | 0.0835 (4) | 0.8758 (7) | 0.4601 (4) | 0.117 (2) | |
H49A | 0.0982 | 0.7995 | 0.486 | 0.176* | |
H49B | 0.0278 | 0.8726 | 0.4335 | 0.176* | |
H49C | 0.0898 | 0.9397 | 0.499 | 0.176* | |
C50 | 0.1397 (3) | 0.5776 (5) | 0.3403 (3) | 0.0758 (14) | |
H50A | 0.1791 | 0.5632 | 0.3057 | 0.091* | |
H50B | 0.0873 | 0.5906 | 0.3066 | 0.091* | |
C51 | 0.1346 (3) | 0.4674 (5) | 0.3887 (3) | 0.0726 (14) | |
C52A | 0.2148 (10) | 0.4158 (14) | 0.4062 (10) | 0.099 (5) | 0.5 |
H52A | 0.2136 | 0.3437 | 0.4376 | 0.148* | 0.5 |
H52B | 0.2515 | 0.4738 | 0.4352 | 0.148* | 0.5 |
H52C | 0.2328 | 0.3956 | 0.3573 | 0.148* | 0.5 |
C53A | 0.0741 (8) | 0.3832 (14) | 0.3425 (10) | 0.099 (5) | 0.5 |
H53A | 0.0701 | 0.3109 | 0.3731 | 0.149* | 0.5 |
H53B | 0.0914 | 0.362 | 0.2934 | 0.149* | 0.5 |
H53C | 0.022 | 0.4224 | 0.3312 | 0.149* | 0.5 |
C54A | 0.1074 (11) | 0.5004 (16) | 0.4667 (10) | 0.116 (6) | 0.5 |
H54A | 0.1044 | 0.4281 | 0.4975 | 0.175* | 0.5 |
H54B | 0.0547 | 0.5382 | 0.4556 | 0.175* | 0.5 |
H54C | 0.1458 | 0.5558 | 0.4961 | 0.175* | 0.5 |
C52B | 0.2081 (13) | 0.4386 (14) | 0.4517 (9) | 0.110 (6) | 0.5 |
H52D | 0.2549 | 0.427 | 0.4268 | 0.164* | 0.5 |
H52E | 0.198 | 0.3657 | 0.4794 | 0.164* | 0.5 |
H52F | 0.218 | 0.5048 | 0.4889 | 0.164* | 0.5 |
C53B | 0.1269 (12) | 0.3535 (13) | 0.3335 (9) | 0.110 (5) | 0.5 |
H53D | 0.1754 | 0.345 | 0.311 | 0.164* | 0.5 |
H53E | 0.0808 | 0.3631 | 0.2914 | 0.164* | 0.5 |
H53F | 0.1195 | 0.2823 | 0.364 | 0.164* | 0.5 |
C54B | 0.0622 (11) | 0.4802 (16) | 0.4233 (13) | 0.130 (7) | 0.5 |
H54D | 0.0563 | 0.4103 | 0.4556 | 0.196* | 0.5 |
H54E | 0.0155 | 0.4868 | 0.3817 | 0.196* | 0.5 |
H54F | 0.0665 | 0.552 | 0.4558 | 0.196* | 0.5 |
O55 | 0.36702 (14) | 0.7706 (3) | 0.40520 (15) | 0.0533 (7) | |
H43 | 0.262 (2) | 0.673 (3) | 0.459 (2) | 0.041 (10)* | |
O61 | −0.06692 (15) | 0.3012 (3) | −0.09221 (17) | 0.0681 (9) | |
C62 | −0.0031 (2) | 0.3696 (4) | −0.0965 (3) | 0.0547 (11) | |
N63 | 0.0563 (2) | 0.3695 (3) | −0.03533 (19) | 0.0466 (8) | |
N64 | 0.05885 (16) | 0.3060 (3) | 0.03561 (18) | 0.0431 (7) | |
C65 | −0.0238 (2) | 0.2907 (4) | 0.0483 (3) | 0.0546 (11) | |
H65 | −0.0228 | 0.234 | 0.0928 | 0.066* | |
C66 | −0.0709 (2) | 0.2334 (5) | −0.0230 (3) | 0.0670 (14) | |
H66A | −0.05 | 0.1522 | −0.0289 | 0.08* | |
H66B | −0.1273 | 0.2259 | −0.0165 | 0.08* | |
C67 | −0.0578 (2) | 0.4086 (4) | 0.0716 (3) | 0.0648 (13) | |
H67 | −0.0659 | 0.4619 | 0.0248 | 0.078* | |
C68 | −0.1395 (3) | 0.3876 (6) | 0.0954 (4) | 0.118 (3) | |
H68A | −0.1747 | 0.3467 | 0.053 | 0.177* | |
H68B | −0.163 | 0.4643 | 0.1057 | 0.177* | |
H68C | −0.1327 | 0.3383 | 0.1426 | 0.177* | |
C69 | −0.0022 (4) | 0.4701 (7) | 0.1355 (4) | 0.112 (2) | |
H69A | −0.0263 | 0.545 | 0.1487 | 0.168* | |
H69B | 0.0483 | 0.4869 | 0.118 | 0.168* | |
H69C | 0.0077 | 0.4187 | 0.1817 | 0.168* | |
C70 | 0.1029 (2) | 0.1934 (4) | 0.0357 (2) | 0.0482 (9) | |
H70A | 0.1085 | 0.1742 | −0.0186 | 0.058* | |
H70B | 0.0713 | 0.129 | 0.0543 | 0.058* | |
C71 | 0.1850 (2) | 0.1955 (4) | 0.0860 (3) | 0.0574 (11) | |
C72 | 0.2217 (3) | 0.0725 (4) | 0.0846 (4) | 0.0850 (17) | |
H72A | 0.1869 | 0.0136 | 0.1031 | 0.128* | |
H72B | 0.274 | 0.0717 | 0.1186 | 0.128* | |
H72C | 0.228 | 0.0529 | 0.0311 | 0.128* | |
C73 | 0.2369 (3) | 0.2847 (6) | 0.0590 (6) | 0.135 (3) | |
H73A | 0.2433 | 0.2662 | 0.0054 | 0.203* | |
H73B | 0.2891 | 0.2838 | 0.0931 | 0.203* | |
H73C | 0.2129 | 0.3639 | 0.0604 | 0.203* | |
C74 | 0.1731 (5) | 0.2199 (8) | 0.1695 (4) | 0.151 (4) | |
H74A | 0.1381 | 0.1589 | 0.1855 | 0.227* | |
H74B | 0.1488 | 0.2985 | 0.1722 | 0.227* | |
H74C | 0.2248 | 0.2179 | 0.2045 | 0.227* | |
O75 | −0.00226 (17) | 0.4282 (4) | −0.15440 (18) | 0.0753 (10) | |
H63 | 0.092 (2) | 0.422 (4) | −0.030 (2) | 0.039 (11)* | |
O81 | 0.26791 (18) | 0.5980 (3) | 0.87572 (16) | 0.0671 (8) | |
C82 | 0.2004 (3) | 0.5404 (4) | 0.8848 (2) | 0.0540 (10) | |
N83 | 0.1615 (2) | 0.4771 (3) | 0.82481 (18) | 0.0471 (8) | |
N84 | 0.18487 (17) | 0.4653 (3) | 0.75098 (17) | 0.0410 (7) | |
C85 | 0.2253 (2) | 0.5750 (3) | 0.7346 (2) | 0.0445 (9) | |
H85 | 0.248 | 0.5615 | 0.6862 | 0.053* | |
C86 | 0.2943 (3) | 0.5952 (4) | 0.8008 (3) | 0.0614 (12) | |
H86A | 0.3339 | 0.5305 | 0.801 | 0.074* | |
H86B | 0.3207 | 0.6715 | 0.7926 | 0.074* | |
C87 | 0.1666 (3) | 0.6781 (4) | 0.7187 (3) | 0.0571 (11) | |
H87 | 0.144 | 0.6927 | 0.7671 | 0.068* | |
C88 | 0.2050 (4) | 0.7922 (5) | 0.6981 (3) | 0.0865 (16) | |
H88A | 0.1646 | 0.8551 | 0.6882 | 0.13* | |
H88B | 0.2285 | 0.7798 | 0.6512 | 0.13* | |
H88C | 0.2468 | 0.8159 | 0.7415 | 0.13* | |
C89 | 0.0988 (3) | 0.6471 (5) | 0.6541 (4) | 0.111 (2) | |
H89A | 0.0741 | 0.5724 | 0.6668 | 0.167* | |
H89B | 0.1191 | 0.6376 | 0.6051 | 0.167* | |
H89C | 0.059 | 0.711 | 0.6484 | 0.167* | |
C90 | 0.2337 (2) | 0.3574 (4) | 0.7488 (3) | 0.0539 (10) | |
H90A | 0.2631 | 0.3415 | 0.8021 | 0.065* | |
H90B | 0.2736 | 0.3729 | 0.7149 | 0.065* | |
C91 | 0.1870 (3) | 0.2476 (4) | 0.7195 (3) | 0.0619 (12) | |
C92 | 0.2443 (4) | 0.1445 (5) | 0.7213 (5) | 0.114 (2) | |
H92A | 0.2651 | 0.1229 | 0.7757 | 0.172* | |
H92B | 0.2886 | 0.1676 | 0.6953 | 0.172* | |
H92C | 0.2164 | 0.076 | 0.6942 | 0.172* | |
C93 | 0.1213 (5) | 0.2203 (5) | 0.7643 (5) | 0.126 (3) | |
H93A | 0.1442 | 0.2063 | 0.8192 | 0.189* | |
H93B | 0.0925 | 0.1489 | 0.7425 | 0.189* | |
H93C | 0.0843 | 0.2878 | 0.7603 | 0.189* | |
C94 | 0.1492 (5) | 0.2668 (7) | 0.6349 (4) | 0.129 (3) | |
H94A | 0.1189 | 0.1956 | 0.615 | 0.193* | |
H94B | 0.1909 | 0.2818 | 0.6038 | 0.193* | |
H94C | 0.1131 | 0.3355 | 0.631 | 0.193* | |
O95 | 0.1774 (2) | 0.5505 (3) | 0.94701 (17) | 0.0708 (9) | |
H83 | 0.111 (3) | 0.459 (4) | 0.828 (2) | 0.057 (12)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.094 (2) | 0.066 (2) | 0.0474 (19) | 0.018 (2) | 0.0094 (16) | −0.0103 (16) |
C2 | 0.062 (3) | 0.061 (3) | 0.071 (3) | 0.019 (3) | −0.016 (3) | −0.021 (3) |
N3 | 0.0434 (19) | 0.051 (2) | 0.091 (3) | 0.0002 (18) | 0.008 (2) | −0.019 (2) |
N4 | 0.0435 (17) | 0.0341 (17) | 0.0500 (19) | 0.0035 (14) | 0.0072 (14) | −0.0024 (14) |
C5 | 0.046 (2) | 0.039 (2) | 0.042 (2) | −0.0077 (17) | 0.0120 (16) | −0.0003 (16) |
C6 | 0.072 (3) | 0.057 (3) | 0.051 (3) | 0.009 (2) | 0.023 (2) | 0.007 (2) |
C7 | 0.041 (2) | 0.052 (3) | 0.048 (2) | 0.0035 (18) | 0.0075 (17) | 0.0005 (18) |
C8 | 0.044 (2) | 0.096 (4) | 0.065 (3) | 0.011 (2) | 0.016 (2) | −0.002 (3) |
C9 | 0.073 (3) | 0.083 (3) | 0.056 (3) | 0.028 (3) | 0.024 (2) | 0.024 (2) |
C10 | 0.061 (2) | 0.043 (2) | 0.045 (2) | 0.0172 (19) | 0.0050 (19) | 0.0033 (17) |
C11 | 0.055 (2) | 0.035 (2) | 0.045 (2) | 0.0106 (18) | 0.0135 (17) | 0.0044 (17) |
C12 | 0.085 (3) | 0.047 (2) | 0.063 (3) | 0.024 (2) | 0.025 (2) | 0.005 (2) |
C13 | 0.085 (3) | 0.051 (3) | 0.115 (4) | 0.007 (3) | 0.054 (3) | 0.008 (3) |
C14 | 0.090 (3) | 0.073 (3) | 0.047 (3) | 0.021 (3) | 0.004 (2) | −0.013 (2) |
O15 | 0.095 (3) | 0.083 (3) | 0.121 (3) | 0.017 (2) | −0.034 (2) | −0.060 (2) |
O21 | 0.0514 (16) | 0.087 (2) | 0.0508 (18) | 0.0006 (16) | 0.0119 (13) | −0.0258 (16) |
C22 | 0.045 (2) | 0.077 (3) | 0.037 (2) | 0.001 (2) | 0.0083 (17) | −0.013 (2) |
N23 | 0.0409 (18) | 0.066 (2) | 0.037 (2) | −0.0028 (17) | 0.0055 (15) | −0.0118 (17) |
N24 | 0.0366 (16) | 0.054 (2) | 0.0412 (18) | −0.0047 (14) | 0.0076 (13) | −0.0021 (15) |
C25 | 0.039 (2) | 0.056 (3) | 0.046 (2) | −0.0114 (18) | 0.0031 (16) | −0.0085 (18) |
C26 | 0.057 (2) | 0.067 (3) | 0.057 (3) | −0.011 (2) | 0.011 (2) | −0.018 (2) |
C27 | 0.050 (2) | 0.074 (3) | 0.040 (2) | −0.004 (2) | 0.0008 (17) | 0.000 (2) |
C28 | 0.094 (4) | 0.119 (5) | 0.048 (3) | 0.002 (4) | −0.007 (3) | −0.007 (3) |
C29 | 0.081 (3) | 0.081 (4) | 0.072 (3) | 0.015 (3) | 0.012 (3) | 0.017 (3) |
C30 | 0.060 (2) | 0.057 (3) | 0.065 (3) | 0.006 (2) | 0.020 (2) | 0.011 (2) |
C31 | 0.060 (3) | 0.054 (3) | 0.052 (2) | −0.013 (2) | 0.021 (2) | −0.0082 (19) |
C32 | 0.108 (4) | 0.097 (4) | 0.075 (4) | −0.007 (4) | 0.049 (3) | 0.012 (3) |
C33 | 0.141 (5) | 0.138 (6) | 0.080 (4) | −0.077 (5) | 0.061 (4) | −0.058 (4) |
C34 | 0.056 (3) | 0.086 (4) | 0.115 (4) | 0.002 (3) | 0.036 (3) | 0.010 (3) |
O35 | 0.0401 (16) | 0.135 (3) | 0.0543 (19) | −0.0083 (18) | 0.0124 (13) | −0.0325 (19) |
O41 | 0.0426 (14) | 0.078 (2) | 0.0464 (16) | 0.0020 (14) | 0.0070 (12) | 0.0207 (14) |
C42 | 0.038 (2) | 0.053 (2) | 0.042 (2) | 0.0055 (19) | 0.0077 (17) | 0.0018 (18) |
N43 | 0.0388 (17) | 0.061 (2) | 0.041 (2) | 0.0029 (16) | 0.0049 (14) | 0.0135 (17) |
N44 | 0.0369 (16) | 0.057 (2) | 0.047 (2) | −0.0061 (16) | −0.0007 (14) | 0.0031 (16) |
C45 | 0.035 (2) | 0.064 (3) | 0.056 (3) | 0.0010 (19) | 0.0001 (17) | 0.008 (2) |
C46 | 0.049 (2) | 0.075 (3) | 0.050 (3) | 0.004 (2) | −0.0031 (19) | 0.018 (2) |
C47 | 0.043 (2) | 0.062 (3) | 0.086 (4) | 0.009 (2) | 0.009 (2) | 0.009 (3) |
C48 | 0.167 (7) | 0.094 (5) | 0.138 (7) | 0.065 (5) | 0.018 (5) | 0.020 (5) |
C49 | 0.125 (5) | 0.121 (6) | 0.124 (6) | 0.006 (4) | 0.071 (5) | −0.018 (4) |
C50 | 0.088 (4) | 0.079 (4) | 0.055 (3) | −0.029 (3) | −0.003 (2) | −0.001 (3) |
C51 | 0.089 (4) | 0.065 (3) | 0.059 (3) | −0.018 (3) | 0.003 (3) | −0.002 (3) |
C52A | 0.108 (10) | 0.055 (7) | 0.118 (14) | 0.012 (7) | −0.021 (11) | −0.014 (9) |
C53A | 0.088 (9) | 0.077 (11) | 0.121 (12) | −0.021 (8) | −0.014 (9) | 0.000 (8) |
C54A | 0.135 (15) | 0.111 (12) | 0.113 (13) | −0.048 (11) | 0.048 (10) | 0.036 (10) |
C52B | 0.179 (16) | 0.056 (9) | 0.082 (11) | −0.013 (9) | −0.010 (12) | 0.012 (7) |
C53B | 0.176 (17) | 0.058 (8) | 0.084 (9) | −0.016 (11) | −0.005 (12) | −0.015 (6) |
C54B | 0.124 (14) | 0.102 (11) | 0.18 (2) | −0.054 (11) | 0.081 (13) | −0.015 (13) |
O55 | 0.0359 (14) | 0.0705 (19) | 0.0539 (17) | 0.0041 (13) | 0.0090 (12) | 0.0103 (14) |
O61 | 0.0407 (15) | 0.103 (3) | 0.0592 (19) | −0.0076 (16) | 0.0054 (13) | 0.0175 (18) |
C62 | 0.035 (2) | 0.079 (3) | 0.052 (3) | 0.012 (2) | 0.0137 (19) | 0.015 (2) |
N63 | 0.0367 (17) | 0.058 (2) | 0.047 (2) | 0.0010 (18) | 0.0126 (15) | 0.0105 (16) |
N64 | 0.0358 (16) | 0.0461 (19) | 0.0489 (19) | 0.0097 (14) | 0.0116 (13) | 0.0123 (14) |
C65 | 0.040 (2) | 0.067 (3) | 0.060 (3) | 0.012 (2) | 0.0177 (19) | 0.029 (2) |
C66 | 0.037 (2) | 0.083 (4) | 0.081 (3) | −0.004 (2) | 0.012 (2) | 0.022 (3) |
C67 | 0.056 (2) | 0.083 (3) | 0.063 (3) | 0.034 (2) | 0.031 (2) | 0.032 (3) |
C68 | 0.088 (4) | 0.130 (6) | 0.159 (6) | 0.046 (4) | 0.083 (4) | 0.063 (5) |
C69 | 0.128 (5) | 0.125 (5) | 0.082 (4) | 0.071 (5) | 0.016 (4) | −0.016 (4) |
C70 | 0.0370 (19) | 0.040 (2) | 0.067 (3) | 0.0046 (18) | 0.0091 (18) | −0.0033 (19) |
C71 | 0.043 (2) | 0.047 (2) | 0.076 (3) | 0.014 (2) | −0.0071 (19) | −0.004 (2) |
C72 | 0.052 (3) | 0.056 (3) | 0.138 (5) | 0.021 (2) | −0.011 (3) | −0.008 (3) |
C73 | 0.045 (3) | 0.078 (4) | 0.267 (10) | −0.013 (3) | −0.019 (4) | 0.047 (5) |
C74 | 0.173 (7) | 0.174 (8) | 0.083 (5) | 0.106 (7) | −0.041 (5) | −0.021 (5) |
O75 | 0.0564 (17) | 0.121 (3) | 0.0505 (19) | 0.0068 (18) | 0.0150 (14) | 0.0320 (19) |
O81 | 0.081 (2) | 0.073 (2) | 0.0465 (17) | −0.0336 (17) | 0.0100 (15) | −0.0064 (15) |
C82 | 0.075 (3) | 0.046 (2) | 0.041 (2) | −0.014 (2) | 0.013 (2) | 0.0003 (19) |
N83 | 0.053 (2) | 0.050 (2) | 0.0419 (19) | −0.0141 (17) | 0.0191 (15) | −0.0075 (15) |
N84 | 0.0451 (16) | 0.0406 (17) | 0.0418 (18) | −0.0061 (15) | 0.0201 (13) | −0.0026 (14) |
C85 | 0.050 (2) | 0.044 (2) | 0.044 (2) | −0.0114 (18) | 0.0204 (18) | −0.0033 (17) |
C86 | 0.059 (3) | 0.067 (3) | 0.060 (3) | −0.026 (2) | 0.015 (2) | 0.001 (2) |
C87 | 0.081 (3) | 0.043 (2) | 0.054 (3) | −0.001 (2) | 0.030 (2) | 0.0006 (19) |
C88 | 0.118 (4) | 0.050 (3) | 0.086 (4) | −0.022 (3) | 0.004 (3) | 0.008 (3) |
C89 | 0.077 (4) | 0.062 (4) | 0.177 (7) | 0.008 (3) | −0.027 (4) | 0.022 (4) |
C90 | 0.050 (2) | 0.056 (3) | 0.058 (3) | 0.003 (2) | 0.0167 (19) | 0.004 (2) |
C91 | 0.080 (3) | 0.048 (3) | 0.064 (3) | 0.001 (2) | 0.029 (2) | 0.001 (2) |
C92 | 0.151 (6) | 0.057 (4) | 0.150 (6) | 0.030 (4) | 0.067 (5) | 0.006 (4) |
C93 | 0.162 (6) | 0.064 (4) | 0.178 (7) | −0.050 (4) | 0.102 (6) | −0.033 (4) |
C94 | 0.201 (8) | 0.088 (5) | 0.082 (5) | −0.001 (5) | −0.017 (5) | −0.028 (4) |
O95 | 0.107 (2) | 0.068 (2) | 0.0438 (18) | −0.0209 (19) | 0.0316 (16) | −0.0081 (15) |
O1—C2 | 1.342 (6) | C51—C52A | 1.465 (16) |
O1—C6 | 1.453 (6) | C51—C54B | 1.472 (17) |
C2—O15 | 1.205 (5) | C51—C53A | 1.521 (15) |
C2—N3 | 1.342 (6) | C51—C52B | 1.548 (18) |
N3—N4 | 1.415 (5) | C51—C54A | 1.554 (18) |
N3—H3 | 0.85 (5) | C51—C53B | 1.591 (15) |
N4—C5 | 1.466 (4) | C52A—H52A | 0.98 |
N4—C10 | 1.489 (5) | C52A—H52B | 0.98 |
C5—C6 | 1.502 (5) | C52A—H52C | 0.98 |
C5—C7 | 1.525 (5) | C53A—H53A | 0.98 |
C5—H5 | 1 | C53A—H53B | 0.98 |
C6—H6A | 0.99 | C53A—H53C | 0.98 |
C6—H6B | 0.99 | C54A—H54A | 0.98 |
C7—C9 | 1.522 (6) | C54A—H54B | 0.98 |
C7—C8 | 1.530 (5) | C54A—H54C | 0.98 |
C7—H7 | 1 | C52B—H52D | 0.98 |
C8—H8A | 0.98 | C52B—H52E | 0.98 |
C8—H8B | 0.98 | C52B—H52F | 0.98 |
C8—H8C | 0.98 | C53B—H53D | 0.98 |
C9—H9A | 0.98 | C53B—H53E | 0.98 |
C9—H9B | 0.98 | C53B—H53F | 0.98 |
C9—H9C | 0.98 | C54B—H54D | 0.98 |
C10—C11 | 1.529 (5) | C54B—H54E | 0.98 |
C10—H10A | 0.99 | C54B—H54F | 0.98 |
C10—H10B | 0.99 | O61—C62 | 1.343 (5) |
C11—C14 | 1.511 (6) | O61—C66 | 1.436 (5) |
C11—C13 | 1.513 (6) | C62—O75 | 1.206 (5) |
C11—C12 | 1.526 (5) | C62—N63 | 1.335 (5) |
C12—H12A | 0.98 | N63—N64 | 1.420 (4) |
C12—H12B | 0.98 | N63—H63 | 0.84 (4) |
C12—H12C | 0.98 | N64—C70 | 1.470 (5) |
C13—H13A | 0.98 | N64—C65 | 1.473 (4) |
C13—H13B | 0.98 | C65—C66 | 1.501 (7) |
C13—H13C | 0.98 | C65—C67 | 1.527 (6) |
C14—H14A | 0.98 | C65—H65 | 1 |
C14—H14B | 0.98 | C66—H66A | 0.99 |
C14—H14C | 0.98 | C66—H66B | 0.99 |
O21—C22 | 1.345 (5) | C67—C69 | 1.498 (8) |
O21—C26 | 1.444 (5) | C67—C68 | 1.538 (6) |
C22—O35 | 1.219 (5) | C67—H67 | 1 |
C22—N23 | 1.331 (5) | C68—H68A | 0.98 |
N23—N24 | 1.423 (4) | C68—H68B | 0.98 |
N23—H23 | 0.78 (4) | C68—H68C | 0.98 |
N24—C25 | 1.469 (5) | C69—H69A | 0.98 |
N24—C30 | 1.487 (5) | C69—H69B | 0.98 |
C25—C26 | 1.511 (6) | C69—H69C | 0.98 |
C25—C27 | 1.537 (6) | C70—C71 | 1.514 (5) |
C25—H25 | 1 | C70—H70A | 0.99 |
C26—H26A | 0.99 | C70—H70B | 0.99 |
C26—H26B | 0.99 | C71—C73 | 1.467 (8) |
C27—C29 | 1.512 (7) | C71—C72 | 1.518 (6) |
C27—C28 | 1.521 (6) | C71—C74 | 1.527 (8) |
C27—H27 | 1 | C72—H72A | 0.98 |
C28—H28A | 0.98 | C72—H72B | 0.98 |
C28—H28B | 0.98 | C72—H72C | 0.98 |
C28—H28C | 0.98 | C73—H73A | 0.98 |
C29—H29A | 0.98 | C73—H73B | 0.98 |
C29—H29B | 0.98 | C73—H73C | 0.98 |
C29—H29C | 0.98 | C74—H74A | 0.98 |
C30—C31 | 1.517 (5) | C74—H74B | 0.98 |
C30—H30A | 0.99 | C74—H74C | 0.98 |
C30—H30B | 0.99 | O81—C82 | 1.352 (5) |
C31—C34 | 1.502 (7) | O81—C86 | 1.452 (5) |
C31—C32 | 1.513 (7) | C82—O95 | 1.220 (5) |
C31—C33 | 1.521 (7) | C82—N83 | 1.339 (5) |
C32—H32A | 0.98 | N83—N84 | 1.417 (4) |
C32—H32B | 0.98 | N83—H83 | 0.89 (4) |
C32—H32C | 0.98 | N84—C85 | 1.463 (5) |
C33—H33A | 0.98 | N84—C90 | 1.473 (5) |
C33—H33B | 0.98 | C85—C86 | 1.513 (6) |
C33—H33C | 0.98 | C85—C87 | 1.522 (6) |
C34—H34A | 0.98 | C85—H85 | 1 |
C34—H34B | 0.98 | C86—H86A | 0.99 |
C34—H34C | 0.98 | C86—H86B | 0.99 |
O41—C42 | 1.339 (4) | C87—C89 | 1.504 (7) |
O41—C46 | 1.459 (5) | C87—C88 | 1.510 (7) |
C42—O55 | 1.229 (4) | C87—H87 | 1 |
C42—N43 | 1.332 (5) | C88—H88A | 0.98 |
N43—N44 | 1.417 (4) | C88—H88B | 0.98 |
N43—H43 | 0.88 (4) | C88—H88C | 0.98 |
N44—C45 | 1.473 (5) | C89—H89A | 0.98 |
N44—C50 | 1.473 (6) | C89—H89B | 0.98 |
C45—C46 | 1.512 (6) | C89—H89C | 0.98 |
C45—C47 | 1.513 (7) | C90—C91 | 1.507 (6) |
C45—H45 | 1 | C90—H90A | 0.99 |
C46—H46A | 0.99 | C90—H90B | 0.99 |
C46—H46B | 0.99 | C91—C93 | 1.503 (7) |
C47—C48 | 1.489 (8) | C91—C92 | 1.511 (7) |
C47—C49 | 1.520 (8) | C91—C94 | 1.516 (8) |
C47—H47 | 1 | C92—H92A | 0.98 |
C48—H48A | 0.98 | C92—H92B | 0.98 |
C48—H48B | 0.98 | C92—H92C | 0.98 |
C48—H48C | 0.98 | C93—H93A | 0.98 |
C49—H49A | 0.98 | C93—H93B | 0.98 |
C49—H49B | 0.98 | C93—H93C | 0.98 |
C49—H49C | 0.98 | C94—H94A | 0.98 |
C50—C51 | 1.507 (7) | C94—H94B | 0.98 |
C50—H50A | 0.99 | C94—H94C | 0.98 |
C50—H50B | 0.99 | ||
C2—O1—C6 | 119.0 (3) | C54B—C51—C53A | 74.9 (10) |
O15—C2—N3 | 123.8 (6) | C50—C51—C53A | 108.4 (7) |
O15—C2—O1 | 119.1 (5) | C54B—C51—C52B | 111.2 (12) |
N3—C2—O1 | 117.1 (4) | C50—C51—C52B | 116.6 (7) |
C2—N3—N4 | 128.2 (4) | C53A—C51—C52B | 129.3 (9) |
C2—N3—H3 | 117 (3) | C52A—C51—C54A | 108.8 (10) |
N4—N3—H3 | 113 (4) | C50—C51—C54A | 110.3 (7) |
N3—N4—C5 | 107.6 (3) | C53A—C51—C54A | 109.4 (10) |
N3—N4—C10 | 111.4 (3) | C52B—C51—C54A | 76.0 (10) |
C5—N4—C10 | 114.8 (3) | C52A—C51—C53B | 77.5 (10) |
N4—C5—C6 | 108.3 (3) | C54B—C51—C53B | 109.8 (11) |
N4—C5—C7 | 110.9 (3) | C50—C51—C53B | 109.2 (7) |
C6—C5—C7 | 115.2 (3) | C52B—C51—C53B | 103.4 (10) |
N4—C5—H5 | 107.4 | C54A—C51—C53B | 135.5 (9) |
C6—C5—H5 | 107.4 | C51—C52A—H52A | 109.5 |
C7—C5—H5 | 107.4 | C51—C52A—H52B | 109.5 |
O1—C6—C5 | 110.1 (3) | H52A—C52A—H52B | 109.5 |
O1—C6—H6A | 109.6 | C51—C52A—H52C | 109.5 |
C5—C6—H6A | 109.6 | H52A—C52A—H52C | 109.5 |
O1—C6—H6B | 109.6 | H52B—C52A—H52C | 109.5 |
C5—C6—H6B | 109.6 | C51—C53A—H53A | 109.5 |
H6A—C6—H6B | 108.2 | C51—C53A—H53B | 109.5 |
C9—C7—C5 | 110.8 (3) | H53A—C53A—H53B | 109.5 |
C9—C7—C8 | 109.7 (3) | C51—C53A—H53C | 109.5 |
C5—C7—C8 | 112.8 (3) | H53A—C53A—H53C | 109.5 |
C9—C7—H7 | 107.8 | H53B—C53A—H53C | 109.5 |
C5—C7—H7 | 107.8 | C51—C54A—H54A | 109.5 |
C8—C7—H7 | 107.8 | C51—C54A—H54B | 109.5 |
C7—C8—H8A | 109.5 | H54A—C54A—H54B | 109.5 |
C7—C8—H8B | 109.5 | C51—C54A—H54C | 109.5 |
H8A—C8—H8B | 109.5 | H54A—C54A—H54C | 109.5 |
C7—C8—H8C | 109.5 | H54B—C54A—H54C | 109.5 |
H8A—C8—H8C | 109.5 | C51—C52B—H52D | 109.5 |
H8B—C8—H8C | 109.5 | C51—C52B—H52E | 109.5 |
C7—C9—H9A | 109.5 | H52D—C52B—H52E | 109.5 |
C7—C9—H9B | 109.5 | C51—C52B—H52F | 109.5 |
H9A—C9—H9B | 109.5 | H52D—C52B—H52F | 109.5 |
C7—C9—H9C | 109.5 | H52E—C52B—H52F | 109.5 |
H9A—C9—H9C | 109.5 | C51—C53B—H53D | 109.5 |
H9B—C9—H9C | 109.5 | C51—C53B—H53E | 109.5 |
N4—C10—C11 | 112.3 (3) | H53D—C53B—H53E | 109.5 |
N4—C10—H10A | 109.1 | C51—C53B—H53F | 109.5 |
C11—C10—H10A | 109.1 | H53D—C53B—H53F | 109.5 |
N4—C10—H10B | 109.1 | H53E—C53B—H53F | 109.5 |
C11—C10—H10B | 109.1 | C51—C54B—H54D | 109.5 |
H10A—C10—H10B | 107.9 | C51—C54B—H54E | 109.5 |
C14—C11—C13 | 110.9 (4) | H54D—C54B—H54E | 109.5 |
C14—C11—C12 | 108.8 (4) | C51—C54B—H54F | 109.5 |
C13—C11—C12 | 109.8 (3) | H54D—C54B—H54F | 109.5 |
C14—C11—C10 | 110.1 (3) | H54E—C54B—H54F | 109.5 |
C13—C11—C10 | 109.9 (4) | C62—O61—C66 | 120.5 (3) |
C12—C11—C10 | 107.2 (3) | O75—C62—N63 | 123.2 (4) |
C11—C12—H12A | 109.5 | O75—C62—O61 | 119.1 (4) |
C11—C12—H12B | 109.5 | N63—C62—O61 | 117.7 (4) |
H12A—C12—H12B | 109.5 | C62—N63—N64 | 126.6 (3) |
C11—C12—H12C | 109.5 | C62—N63—H63 | 122 (3) |
H12A—C12—H12C | 109.5 | N64—N63—H63 | 110 (3) |
H12B—C12—H12C | 109.5 | N63—N64—C70 | 111.7 (3) |
C11—C13—H13A | 109.5 | N63—N64—C65 | 107.8 (3) |
C11—C13—H13B | 109.5 | C70—N64—C65 | 113.6 (3) |
H13A—C13—H13B | 109.5 | N64—C65—C66 | 108.2 (3) |
C11—C13—H13C | 109.5 | N64—C65—C67 | 110.8 (4) |
H13A—C13—H13C | 109.5 | C66—C65—C67 | 114.8 (4) |
H13B—C13—H13C | 109.5 | N64—C65—H65 | 107.6 |
C11—C14—H14A | 109.5 | C66—C65—H65 | 107.6 |
C11—C14—H14B | 109.5 | C67—C65—H65 | 107.6 |
H14A—C14—H14B | 109.5 | O61—C66—C65 | 111.7 (4) |
C11—C14—H14C | 109.5 | O61—C66—H66A | 109.3 |
H14A—C14—H14C | 109.5 | C65—C66—H66A | 109.3 |
H14B—C14—H14C | 109.5 | O61—C66—H66B | 109.3 |
C22—O21—C26 | 118.6 (3) | C65—C66—H66B | 109.3 |
O35—C22—N23 | 123.0 (4) | H66A—C66—H66B | 107.9 |
O35—C22—O21 | 118.3 (3) | C69—C67—C65 | 112.2 (4) |
N23—C22—O21 | 118.6 (4) | C69—C67—C68 | 110.8 (5) |
C22—N23—N24 | 127.2 (4) | C65—C67—C68 | 109.9 (5) |
C22—N23—H23 | 114 (3) | C69—C67—H67 | 107.9 |
N24—N23—H23 | 118 (3) | C65—C67—H67 | 107.9 |
N23—N24—C25 | 108.1 (3) | C68—C67—H67 | 107.9 |
N23—N24—C30 | 110.9 (3) | C67—C68—H68A | 109.5 |
C25—N24—C30 | 114.3 (3) | C67—C68—H68B | 109.5 |
N24—C25—C26 | 108.7 (3) | H68A—C68—H68B | 109.5 |
N24—C25—C27 | 111.3 (3) | C67—C68—H68C | 109.5 |
C26—C25—C27 | 114.0 (3) | H68A—C68—H68C | 109.5 |
N24—C25—H25 | 107.5 | H68B—C68—H68C | 109.5 |
C26—C25—H25 | 107.5 | C67—C69—H69A | 109.5 |
C27—C25—H25 | 107.5 | C67—C69—H69B | 109.5 |
O21—C26—C25 | 109.8 (3) | H69A—C69—H69B | 109.5 |
O21—C26—H26A | 109.7 | C67—C69—H69C | 109.5 |
C25—C26—H26A | 109.7 | H69A—C69—H69C | 109.5 |
O21—C26—H26B | 109.7 | H69B—C69—H69C | 109.5 |
C25—C26—H26B | 109.7 | N64—C70—C71 | 114.0 (3) |
H26A—C26—H26B | 108.2 | N64—C70—H70A | 108.8 |
C29—C27—C28 | 110.4 (4) | C71—C70—H70A | 108.8 |
C29—C27—C25 | 110.7 (3) | N64—C70—H70B | 108.8 |
C28—C27—C25 | 110.4 (4) | C71—C70—H70B | 108.8 |
C29—C27—H27 | 108.4 | H70A—C70—H70B | 107.7 |
C28—C27—H27 | 108.4 | C73—C71—C70 | 111.9 (4) |
C25—C27—H27 | 108.4 | C73—C71—C72 | 110.0 (4) |
C27—C28—H28A | 109.5 | C70—C71—C72 | 108.5 (4) |
C27—C28—H28B | 109.5 | C73—C71—C74 | 111.7 (6) |
H28A—C28—H28B | 109.5 | C70—C71—C74 | 106.9 (4) |
C27—C28—H28C | 109.5 | C72—C71—C74 | 107.5 (5) |
H28A—C28—H28C | 109.5 | C71—C72—H72A | 109.5 |
H28B—C28—H28C | 109.5 | C71—C72—H72B | 109.5 |
C27—C29—H29A | 109.5 | H72A—C72—H72B | 109.5 |
C27—C29—H29B | 109.5 | C71—C72—H72C | 109.5 |
H29A—C29—H29B | 109.5 | H72A—C72—H72C | 109.5 |
C27—C29—H29C | 109.5 | H72B—C72—H72C | 109.5 |
H29A—C29—H29C | 109.5 | C71—C73—H73A | 109.5 |
H29B—C29—H29C | 109.5 | C71—C73—H73B | 109.5 |
N24—C30—C31 | 113.1 (3) | H73A—C73—H73B | 109.5 |
N24—C30—H30A | 109 | C71—C73—H73C | 109.5 |
C31—C30—H30A | 109 | H73A—C73—H73C | 109.5 |
N24—C30—H30B | 109 | H73B—C73—H73C | 109.5 |
C31—C30—H30B | 109 | C71—C74—H74A | 109.5 |
H30A—C30—H30B | 107.8 | C71—C74—H74B | 109.5 |
C34—C31—C32 | 108.5 (4) | H74A—C74—H74B | 109.5 |
C34—C31—C30 | 109.5 (4) | C71—C74—H74C | 109.5 |
C32—C31—C30 | 108.4 (4) | H74A—C74—H74C | 109.5 |
C34—C31—C33 | 110.1 (5) | H74B—C74—H74C | 109.5 |
C32—C31—C33 | 110.9 (4) | C82—O81—C86 | 119.8 (3) |
C30—C31—C33 | 109.5 (4) | O95—C82—N83 | 123.3 (4) |
C31—C32—H32A | 109.5 | O95—C82—O81 | 118.1 (4) |
C31—C32—H32B | 109.5 | N83—C82—O81 | 118.6 (4) |
H32A—C32—H32B | 109.5 | C82—N83—N84 | 125.2 (3) |
C31—C32—H32C | 109.5 | C82—N83—H83 | 115 (3) |
H32A—C32—H32C | 109.5 | N84—N83—H83 | 118 (3) |
H32B—C32—H32C | 109.5 | N83—N84—C85 | 108.3 (3) |
C31—C33—H33A | 109.5 | N83—N84—C90 | 110.5 (3) |
C31—C33—H33B | 109.5 | C85—N84—C90 | 113.6 (3) |
H33A—C33—H33B | 109.5 | N84—C85—C86 | 107.9 (3) |
C31—C33—H33C | 109.5 | N84—C85—C87 | 111.1 (3) |
H33A—C33—H33C | 109.5 | C86—C85—C87 | 115.0 (4) |
H33B—C33—H33C | 109.5 | N84—C85—H85 | 107.5 |
C31—C34—H34A | 109.5 | C86—C85—H85 | 107.5 |
C31—C34—H34B | 109.5 | C87—C85—H85 | 107.5 |
H34A—C34—H34B | 109.5 | O81—C86—C85 | 111.4 (3) |
C31—C34—H34C | 109.5 | O81—C86—H86A | 109.3 |
H34A—C34—H34C | 109.5 | C85—C86—H86A | 109.3 |
H34B—C34—H34C | 109.5 | O81—C86—H86B | 109.3 |
C42—O41—C46 | 119.1 (3) | C85—C86—H86B | 109.3 |
O55—C42—N43 | 122.5 (4) | H86A—C86—H86B | 108 |
O55—C42—O41 | 118.0 (3) | C89—C87—C88 | 109.1 (4) |
N43—C42—O41 | 119.6 (3) | C89—C87—C85 | 110.7 (4) |
C42—N43—N44 | 125.8 (3) | C88—C87—C85 | 113.0 (4) |
C42—N43—H43 | 117 (2) | C89—C87—H87 | 108 |
N44—N43—H43 | 113 (2) | C88—C87—H87 | 108 |
N43—N44—C45 | 108.2 (3) | C85—C87—H87 | 108 |
N43—N44—C50 | 111.2 (4) | C87—C88—H88A | 109.5 |
C45—N44—C50 | 114.5 (3) | C87—C88—H88B | 109.5 |
N44—C45—C46 | 108.4 (3) | H88A—C88—H88B | 109.5 |
N44—C45—C47 | 110.2 (3) | C87—C88—H88C | 109.5 |
C46—C45—C47 | 116.0 (4) | H88A—C88—H88C | 109.5 |
N44—C45—H45 | 107.3 | H88B—C88—H88C | 109.5 |
C46—C45—H45 | 107.3 | C87—C89—H89A | 109.5 |
C47—C45—H45 | 107.3 | C87—C89—H89B | 109.5 |
O41—C46—C45 | 109.6 (3) | H89A—C89—H89B | 109.5 |
O41—C46—H46A | 109.7 | C87—C89—H89C | 109.5 |
C45—C46—H46A | 109.7 | H89A—C89—H89C | 109.5 |
O41—C46—H46B | 109.7 | H89B—C89—H89C | 109.5 |
C45—C46—H46B | 109.7 | N84—C90—C91 | 114.5 (3) |
H46A—C46—H46B | 108.2 | N84—C90—H90A | 108.6 |
C48—C47—C45 | 112.4 (5) | C91—C90—H90A | 108.6 |
C48—C47—C49 | 110.1 (5) | N84—C90—H90B | 108.6 |
C45—C47—C49 | 111.6 (4) | C91—C90—H90B | 108.6 |
C48—C47—H47 | 107.5 | H90A—C90—H90B | 107.6 |
C45—C47—H47 | 107.5 | C93—C91—C90 | 112.8 (4) |
C49—C47—H47 | 107.5 | C93—C91—C92 | 111.7 (5) |
C47—C48—H48A | 109.5 | C90—C91—C92 | 108.6 (4) |
C47—C48—H48B | 109.5 | C93—C91—C94 | 107.7 (6) |
H48A—C48—H48B | 109.5 | C90—C91—C94 | 108.8 (4) |
C47—C48—H48C | 109.5 | C92—C91—C94 | 107.0 (5) |
H48A—C48—H48C | 109.5 | C91—C92—H92A | 109.5 |
H48B—C48—H48C | 109.5 | C91—C92—H92B | 109.5 |
C47—C49—H49A | 109.5 | H92A—C92—H92B | 109.5 |
C47—C49—H49B | 109.5 | C91—C92—H92C | 109.5 |
H49A—C49—H49B | 109.5 | H92A—C92—H92C | 109.5 |
C47—C49—H49C | 109.5 | H92B—C92—H92C | 109.5 |
H49A—C49—H49C | 109.5 | C91—C93—H93A | 109.5 |
H49B—C49—H49C | 109.5 | C91—C93—H93B | 109.5 |
N44—C50—C51 | 115.2 (4) | H93A—C93—H93B | 109.5 |
N44—C50—H50A | 108.5 | C91—C93—H93C | 109.5 |
C51—C50—H50A | 108.5 | H93A—C93—H93C | 109.5 |
N44—C50—H50B | 108.5 | H93B—C93—H93C | 109.5 |
C51—C50—H50B | 108.5 | C91—C94—H94A | 109.5 |
H50A—C50—H50B | 107.5 | C91—C94—H94B | 109.5 |
C52A—C51—C54B | 140.4 (13) | H94A—C94—H94B | 109.5 |
C52A—C51—C50 | 107.3 (8) | C91—C94—H94C | 109.5 |
C54B—C51—C50 | 106.5 (9) | H94A—C94—H94C | 109.5 |
C52A—C51—C53A | 112.6 (9) | H94B—C94—H94C | 109.5 |
C6—O1—C2—O15 | −179.7 (4) | N44—C45—C47—C48 | 176.2 (5) |
C6—O1—C2—N3 | −1.4 (6) | C46—C45—C47—C48 | 52.6 (6) |
O15—C2—N3—N4 | 171.3 (4) | N44—C45—C47—C49 | −59.5 (5) |
O1—C2—N3—N4 | −6.9 (7) | C46—C45—C47—C49 | 176.8 (4) |
C2—N3—N4—C5 | −20.3 (6) | N43—N44—C50—C51 | 81.6 (5) |
C2—N3—N4—C10 | 106.3 (5) | C45—N44—C50—C51 | −155.4 (4) |
N3—N4—C5—C6 | 52.0 (4) | N44—C50—C51—C52A | −86.4 (8) |
C10—N4—C5—C6 | −72.6 (4) | N44—C50—C51—C54B | 72.6 (10) |
N3—N4—C5—C7 | −75.3 (4) | N44—C50—C51—C53A | 151.8 (8) |
C10—N4—C5—C7 | 160.1 (3) | N44—C50—C51—C52B | −52.1 (10) |
C2—O1—C6—C5 | 35.1 (5) | N44—C50—C51—C54A | 32.0 (9) |
N4—C5—C6—O1 | −61.2 (4) | N44—C50—C51—C53B | −168.8 (9) |
C7—C5—C6—O1 | 63.5 (4) | C66—O61—C62—O75 | −178.0 (4) |
N4—C5—C7—C9 | −60.6 (4) | C66—O61—C62—N63 | 1.6 (6) |
C6—C5—C7—C9 | 176.0 (4) | O75—C62—N63—N64 | 178.0 (4) |
N4—C5—C7—C8 | 175.9 (3) | O61—C62—N63—N64 | −1.5 (6) |
C6—C5—C7—C8 | 52.6 (5) | C62—N63—N64—C70 | 97.4 (4) |
N3—N4—C10—C11 | 118.9 (4) | C62—N63—N64—C65 | −28.1 (5) |
C5—N4—C10—C11 | −118.5 (4) | N63—N64—C65—C66 | 54.1 (4) |
N4—C10—C11—C14 | 62.7 (4) | C70—N64—C65—C66 | −70.2 (4) |
N4—C10—C11—C13 | −59.7 (4) | N63—N64—C65—C67 | −72.5 (4) |
N4—C10—C11—C12 | −179.0 (3) | C70—N64—C65—C67 | 163.2 (3) |
C26—O21—C22—O35 | 177.6 (4) | C62—O61—C66—C65 | 28.0 (6) |
C26—O21—C22—N23 | −6.0 (6) | N64—C65—C66—O61 | −56.3 (4) |
O35—C22—N23—N24 | 173.1 (4) | C67—C65—C66—O61 | 68.0 (4) |
O21—C22—N23—N24 | −3.2 (6) | N64—C65—C67—C69 | −48.6 (5) |
C22—N23—N24—C25 | −21.1 (5) | C66—C65—C67—C69 | −171.5 (4) |
C22—N23—N24—C30 | 104.9 (5) | N64—C65—C67—C68 | −172.3 (4) |
N23—N24—C25—C26 | 50.9 (4) | C66—C65—C67—C68 | 64.8 (5) |
C30—N24—C25—C26 | −73.1 (4) | N63—N64—C70—C71 | 105.7 (4) |
N23—N24—C25—C27 | −75.6 (4) | C65—N64—C70—C71 | −132.2 (4) |
C30—N24—C25—C27 | 160.5 (3) | N64—C70—C71—C73 | −61.7 (6) |
C22—O21—C26—C25 | 37.7 (5) | N64—C70—C71—C72 | 176.7 (4) |
N24—C25—C26—O21 | −60.8 (4) | N64—C70—C71—C74 | 61.0 (6) |
C27—C25—C26—O21 | 64.0 (4) | C86—O81—C82—O95 | −175.7 (4) |
N24—C25—C27—C29 | −57.2 (4) | C86—O81—C82—N83 | 3.1 (6) |
C26—C25—C27—C29 | 179.3 (4) | O95—C82—N83—N84 | 178.4 (4) |
N24—C25—C27—C28 | −179.8 (3) | O81—C82—N83—N84 | −0.4 (6) |
C26—C25—C27—C28 | 56.8 (5) | C82—N83—N84—C85 | −31.3 (5) |
N23—N24—C30—C31 | 120.1 (4) | C82—N83—N84—C90 | 93.7 (4) |
C25—N24—C30—C31 | −117.4 (4) | N83—N84—C85—C86 | 56.7 (4) |
N24—C30—C31—C34 | 61.6 (5) | C90—N84—C85—C86 | −66.5 (4) |
N24—C30—C31—C32 | 179.8 (4) | N83—N84—C85—C87 | −70.3 (4) |
N24—C30—C31—C33 | −59.2 (5) | C90—N84—C85—C87 | 166.5 (3) |
C46—O41—C42—O55 | −178.8 (4) | C82—O81—C86—C85 | 25.6 (6) |
C46—O41—C42—N43 | 1.0 (6) | N84—C85—C86—O81 | −55.8 (4) |
O55—C42—N43—N44 | 174.1 (4) | C87—C85—C86—O81 | 68.9 (4) |
O41—C42—N43—N44 | −5.7 (6) | N84—C85—C87—C89 | −54.8 (5) |
C42—N43—N44—C45 | −23.6 (5) | C86—C85—C87—C89 | −177.8 (4) |
C42—N43—N44—C50 | 102.9 (5) | N84—C85—C87—C88 | −177.5 (4) |
N43—N44—C45—C46 | 54.1 (4) | C86—C85—C87—C88 | 59.5 (5) |
C50—N44—C45—C46 | −70.5 (4) | N83—N84—C90—C91 | 91.5 (4) |
N43—N44—C45—C47 | −73.9 (4) | C85—N84—C90—C91 | −146.5 (4) |
C50—N44—C45—C47 | 161.6 (4) | N84—C90—C91—C93 | −55.0 (6) |
C42—O41—C46—C45 | 31.4 (5) | N84—C90—C91—C92 | −179.4 (4) |
N44—C45—C46—O41 | −59.2 (5) | N84—C90—C91—C94 | 64.5 (5) |
C47—C45—C46—O41 | 65.3 (5) |
D—H···A | D—H | H···A | D···A | D—H···A |
N23—H23···O55i | 0.78 (4) | 2.16 (4) | 2.937 (5) | 177 (5) |
N43—H43···O35ii | 0.88 (4) | 1.99 (4) | 2.868 (5) | 175 (3) |
N63—H63···O95iii | 0.84 (4) | 2.13 (4) | 2.949 (5) | 163 (3) |
N83—H83···O75iv | 0.89 (4) | 2.04 (4) | 2.926 (4) | 175 (4) |
Symmetry codes: (i) −x+1, y−1/2, −z+1; (ii) −x+1, y+1/2, −z+1; (iii) x, y, z−1; (iv) x, y, z+1. |
Experimental details
Crystal data | |
Chemical formula | C11H22N2O2 |
Mr | 214.3 |
Crystal system, space group | Monoclinic, P21 |
Temperature (K) | 193 |
a, b, c (Å) | 17.0330 (18), 11.2270 (12), 17.404 (2) |
β (°) | 100.073 (2) |
V (Å3) | 3276.9 (6) |
Z | 10 |
Radiation type | Mo Kα |
µ (mm−1) | 0.08 |
Crystal size (mm) | 0.6 × 0.32 × 0.27 |
Data collection | |
Diffractometer | Bruker P4/R4/SMART 1000 CCD |
Absorption correction | Multi-scan (SADABS in SAINT-Plus; Bruker, 1999) |
Tmin, Tmax | 0.812, 0.943 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 16431, 7042, 4526 |
Rint | 0.044 |
(sin θ/λ)max (Å−1) | 0.625 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.052, 0.144, 1.03 |
No. of reflections | 7042 |
No. of parameters | 723 |
No. of restraints | 1 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.27, −0.17 |
Computer programs: SMART (Bruker, 1999), SAINT (Bruker, 1999), SIR2004 (Burla et al., 2005), SHELXL97 (Sheldrick, 2008), ORTEP-3 for Windows (Farrugia, 1997), WinGX (Farrugia, 1999), publCIF (Westrip, 2010) and Mercury (Macrae et al., 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N23—H23···O55i | 0.78 (4) | 2.16 (4) | 2.937 (5) | 177 (5) |
N43—H43···O35ii | 0.88 (4) | 1.99 (4) | 2.868 (5) | 175 (3) |
N63—H63···O95iii | 0.84 (4) | 2.13 (4) | 2.949 (5) | 163 (3) |
N83—H83···O75iv | 0.89 (4) | 2.04 (4) | 2.926 (4) | 175 (4) |
Symmetry codes: (i) −x+1, y−1/2, −z+1; (ii) −x+1, y+1/2, −z+1; (iii) x, y, z−1; (iv) x, y, z+1. |
Acknowledgements
This material is based upon work supported by the US National Science Foundation (CHE-0348158) (to GMF) and the American Chemical Society Petroleum Research Fund (#407771B) (to SRH). GMF thanks Dr Robert McDonald, Dr Michael Ferguson, and the University of Alberta X-ray Crystallography Laboratory for the data collection.
References
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This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
The fundamental structure of 1,3,4-oxadiazinan-2-one compounds has been known for nearly forty years (Trepanier et al., 1968). We are interested in studying the underlying factors for differing conformations of this heterocycle and for its use as a chiral auxiliary in aldol addition reactions (Casper et al., 2002; Burgeson et al., 2004).
The oxadiazinanone ring is well suited to accommodate H-bonded dimers of the R22(8) type (Bernstein et al., 1995; Etter et al., 1990). The H-bond occurs most naturally between the carbonyl oxygen on the first molecule and the nitrogen containing the hydrogen atom on the second molecule, and vice versa. The result is an eight-membered ring in which two of the connections are H-bonds. These H-bonded dimers have a strong propensity to form in the oxadiazinanone system (Anderson et al., 2006). A few examples of this type of H-bonding are seen in structures by Addison et al. (2008), Rodrigues et al. (2006), and Szczepura et al. (2004) (with REFCODES LOBVII, GEGZUO, and YAGJEW, respectively).
The title compound packs into a monoclinic, P21, space group. This compound is unusual in that there are five molecules in the asymmetric unit (see Figure 1). The best of these is illustrated in Figure 2. Of these five molecules, two pairs are engaged in R22(8) type H-bonding. The fifth molecule does not engage in H-bonding because the donor atom is surrounded by neopentyl substituents, effectively blocking any H-bonds to an acceptor atom. Figure 3 shows all five molecules in a wireframe style, with key atoms shown in a space-fill style, to highlight how the N—H is hemmed in by neopentyl substituents. Another, interactive, view in Figure 4 shows how inaccessible the donor N really is.
The number of crystallographically independent molecules in the asymmetric unit also warrants notice. Most of the structures in the Cambridge Structural Database have a Z' less than or equal to 1. According to the August 2010 edition of the CSD (Allen, 2002), 91.1% of the structures have a Z' less than or equal to 1. As Z' increases, the percentage of structures decreases (Z'=2, 7.7%; Z'=3, 0.42%; Z'=4, 0.40%). Only 0.014% (N=73) of structures in the CSD have a Z'=5, which is a property of this structure.
Since the conformation of the heterocycle is of some interest, structure overlays were conducted in Mercury (Macrae et al., 2008). Surprisingly, all five heterocycles exhibit the same conformation (seen in Figure 5); there is some swing observed in the isopropyl and neopentyl groups, but that deviation does not require the heterocycle to assume a different position in the crystal array. A Cremer-Pople ring analysis (Cremer & Pople, 1975; Boeyens, 1978), performed in PLATON (Spek, 2009), shows that all five molecules exhibit the 5E ring conformation, which is an envelope conformation with C5 as the flap apex. The data for the five oxadiazinanone rings are as follows: Ring 1 (O1—C6) - Q=0.511 (4); θ=56.7 (5)°; Φ=251.2 (5)°, Ring 2 (O21—C26) - Q=0.499 (4); θ=53.7 (5)°; Φ=253.9 (5)°, Ring 3 (O41—C46) - Q=0.510 (4); θ=56.7 (4)°; Φ=246.5 (5)°, Ring 4 (O61—C66) - Q=0.492 (5); θ=55.6 (5)°; Φ=239.9 (6)°, Ring 5 (O81—C86) - Q=0.500 (4); θ=55.9 (5)°; Φ=236.4 (5)°.
Upon conducting a Mogul geometry check (Bruno et al., 2004), the N4—C10 (1.490 (5) Å) and N24—C30 bonds (1.488 (5) Å) were flagged as being outside the typical range for a C—N bond (mean 1.46 ±0.01 Å). This bond is the one between the N atom of the heterocycle and the neopentyl substituent. This bond in the other three crystallographically independent molecules is not flagged. The bonds C50—C51 (1.508 (7) Å) and C90—C91 (1.507 (6) Å) were also flagged as unusual compared to the mean of 1.54 ±0.01 Å. One last bond, N84—C85, was considered unusual with a value of 1.463 (5) Å versus a mean of 1.49 ±0.01 Å. There is no obvious particular chemical or crystallographic explanation for these deviations. However, they still appear to be within an acceptable range. All angles were reported to be within normal limits.