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The title compound, C13H18N2O2, is an N4-isopropyl-L-phenyl­alanine-based oxadiazinanone. Although the two mol­ecules in the asymmetric unit are oriented appropriately for hydrogen bonding, the distance between the donor and acceptor atoms is large enough to support only weak, if any, hydrogen bonding. The absolute configuration is known based on the known starting compounds in the synthetic procedure.

Supporting information

cif

Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536808013056/sg2243sup1.cif
Contains datablocks global, I

hkl

Structure factor file (CIF format) https://doi.org/10.1107/S1600536808013056/sg2243Isup2.hkl
Contains datablock I

CCDC reference: 690937

Key indicators

  • Single-crystal X-ray study
  • T = 100 K
  • Mean [sigma](C-C) = 0.005 Å
  • R factor = 0.060
  • wR factor = 0.134
  • Data-to-parameter ratio = 11.4

checkCIF/PLATON results

No syntax errors found



Alert level C PLAT340_ALERT_3_C Low Bond Precision on C-C Bonds (x 1000) Ang ... 5
Author Response: The few low precision bonds above the test threshold are only barely so. The refinement seems to be the best possible for the dataset. Having two independent molecules in the unit cell provides access to better average bond precision for those in question.
PLAT066_ALERT_1_C Predicted and Reported Transmissions Identical .          ?
Author Response: SADABS calculated a "Ratio of minimum to maximum apparent transmission: 0.859376". This seems anomalously low for a C,H,N,O structure, but commonly occurs when using SADABS. The values calculated by SHELXL seem to be equally meaningful, so they were reported unchanged.

PLAT720_ALERT_4_C Number of Unusual/Non-Standard Labels ..........          8
Author Response: Our labeling scheme was analogous to past related structures.
PLAT790_ALERT_4_C Centre of Gravity not Within Unit Cell: Resd.  #          2
              C13 H18 N2 O2
Author Response: Choice of residue location is better for H-bond viewing when looking at asymmetric unit alone.

Alert level G REFLT03_ALERT_4_G Please check that the estimate of the number of Friedel pairs is correct. If it is not, please give the correct count in the _publ_section_exptl_refinement section of the submitted CIF. From the CIF: _diffrn_reflns_theta_max 28.28 From the CIF: _reflns_number_total 3499 Count of symmetry unique reflns 3498 Completeness (_total/calc) 100.03% TEST3: Check Friedels for noncentro structure Estimate of Friedel pairs measured 1 Fraction of Friedel pairs measured 0.000 Are heavy atom types Z>Si present no
Author Response: MERG 4 gives 3499 unique reflections; MERG 2 gives 6209 unique reflections, so there are 2710 Friedel pairs that were measured; however, final refinement was carried out using MERG 4.

PLAT791_ALERT_4_G Confirm the Absolute Configuration of C5A    ...          S
Author Response: We have checked them carefully and they are correctly assigned.

PLAT791_ALERT_4_G Confirm the Absolute Configuration of C5B    ...          S
Author Response: We have checked them carefully and they are correctly assigned.


0 ALERT level A = In general: serious problem 0 ALERT level B = Potentially serious problem 4 ALERT level C = Check and explain 3 ALERT level G = General alerts; check 1 ALERT type 1 CIF construction/syntax error, inconsistent or missing data 0 ALERT type 2 Indicator that the structure model may be wrong or deficient 1 ALERT type 3 Indicator that the structure quality may be low 5 ALERT type 4 Improvement, methodology, query or suggestion 0 ALERT type 5 Informative message, check

Comment top

The synthesis (Hitchcock et al., 2001), conformational analysis (Casper, Blackburn et al., 2002; Burgeson et al. 2004), and asymmetric applications (Casper & Hitchcock, 2003; Casper, Burgeson et al., 2002; Ferrence et al. 2003; Hitchcock et al. 2004; Hitchcock et al. 2001; Squire et al. 2005; Szczepura et al. 2004) of 3,4,5,6-tetrahydro-2H-1,3,4-oxadiazinan-2-ones have only thoroughly been studied in the last ten years. We have been interested in synthesizing new oxadiazinanones for use as chiral auxillaries in aldol addition reactions. We synthesized the title compound in order to study the conformation that the heterocycle adopts. Herein we report the single-crystal X-ray structure analysis of the N4-isopropyl-L-phenylalanine based oxiadiazinanone.

Other oxadiazinanones have been reported and studied, but the title compound is one of few studied that is not substituted at the N3 position. Other oxadiazinanone structures (Burgeson et al., 2004; Casper, Blackburn et al., 2002; Casper, Burgeson et al., 2002; Ferrence et al., 2003; Hitchcock et al., 2001, 2004) are substituted with a carbonyl at the N3 position. These N3 substituted oxadiazinanones adopt a twist-boat conformation, as does the title compound. This is also consistent with related oxadiazinanones not substituted at the N3 position (Szczepura et al., 2004). The C7B—C5B—N4B—C14B torsion angle is 159.1 (2)°, and the C7A—C5A—N4A—C14A torsion angle is 155.5 (2)°. Previously reported oxadiazinanones with no substitution at the N3 position have torsion angles between 161.79–163.16°. A Mogul (Bruno et al. 2004) geometry check showed all non-H bond angles and distances to be normal. The molecular structure (Fig. 1.) of I includes two independent molecules in the asymmetric unit. The oxadiazinanone moieties are essentially isostructural. The primary difference between the two molecules is the orientation of the benzyl group attached to C5A/B (Figs. 2. and 3.). The respective -56.9 (3)° N4A—C5A—C7B—C8A and -175.5 (2)° N4A—C5A—C7B—C8A torsion angles quantify this difference.

Hydrogen-bonding interactions usually appear to play a key role in the crystal packing of oxadiazinanones (Szczepura et al., 2004). However, it may be that the optimal crystal packing simply happens to yield an arrangement of molecules which are suggestive of a hydrogen bonding motif. That is packing forces other than formation of the weak H-bonding fortuitously lead to the motif. In the title compound, the 2.83 Å N3A—O17B and 2.89 Å N3B—O17A donor to acceptor separations are large enough to support only weak, if any, hydrogen bonding (Fig 4.). This interaction is further illustrated in the Jmol enhanced figure (Fig. 5).

Related literature top

For related literature, see: Burgeson et al. (2004); Casper, Blackburn et al. (2002); Casper, Burgeson et al. (2002); Casper & Hitchcock (2003); Dore et al. (2006); Ferrence et al. (2003); Hitchcock et al. (2004); Hitchcock et al. (2001); Squire et al. (2005); Szczepura et al. (2004); Bruno et al. (2004).

Experimental top

The title compound was prepared as previously reported (Dore et al. (2006)).

Refinement top

All non-H atoms were refined anisotropically without disorder. All H atoms were initially identified through difference Fourier syntheses then removed and included in the refinement in the riding-model approximation (C–H = 0.95, 0.98, 0.99 and 1.00 Å for Ar–H, CH3 and CH2 and CH; N–H = 0.88 Å; Uiso(H) = 1.2Ueq(C) except for methyl groups, where Uiso(H) = 1.5Ueq(C)). In the absence of significant anomalous scattering effects, Friedel pairs were merged.

Computing details top

Data collection: SMART (Bruker, 2003); cell refinement: SAINT-Plus (Bruker, 2003); data reduction: SAINT-Plus (Bruker, 2003); 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) and Mercury (Macrae et al., 2006); software used to prepare material for publication: WinGX (Farrugia, 1999) and publCIF (Westrip, 2008).

Figures top
[Figure 1] Fig. 1. The molecular structure of compound (I), with the atomic numbering scheme. Displacement ellipsoids are drawn at the 50% probability level.
[Figure 2] Fig. 2. A Mercury view of the asymmetric unit of (I) highlighting the 2.83 Å N3A—O17B and 2.89 Å N3B—O17A donor to acceptor separations which support only weak, if any, hydrogen bonding.
[Figure 3] Fig. 3. A Mercury overlay of the two independent molecules in the asymmetric unit of (I) with H atoms shown in light blue.
[Figure 4] Fig. 4. A Mercury overlay of the two independent molecules in the asymmetric unit of (I) with one molecule shown in blue and one shown in violet.
[Figure 5] Fig. 5. Jmol enhanced figure of I. The default view shows the basic unit-cell contents. The pair of molecules forming the asymmetric unit and the putative H-bonding pair of molecules may be highlighted when viewing the active enhanced figure.
(4R,5S)-5-Benzyl-4-isopropyl-1,3,4-oxadiazinan-2-one top
Crystal data top
C13H18N2O2F(000) = 1008
Mr = 234.29Dx = 1.242 Mg m3
Orthorhombic, P212121Mo Kα radiation, λ = 0.71073 Å
Hall symbol: P 2ac 2abCell parameters from 8817 reflections
a = 9.6423 (14) Åθ = 2.3–30.5°
b = 11.4974 (17) ŵ = 0.09 mm1
c = 22.600 (3) ÅT = 100 K
V = 2505.5 (6) Å3Block, colourless
Z = 80.43 × 0.23 × 0.23 mm
Data collection top
Bruker SMART APEX CCD
diffractometer
3499 independent reflections
Radiation source: sealed tube3403 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.041
ω scansθmax = 28.3°, θmin = 1.8°
Absorption correction: multi-scan
SADABS in SAINT-Plus (Bruker, 2003)
h = 1212
Tmin = 0.965, Tmax = 0.981k = 1515
25602 measured reflectionsl = 2930
Refinement top
Refinement on F20 restraints
Least-squares matrix: fullH-atom parameters constrained
R[F2 > 2σ(F2)] = 0.060 w = 1/[σ2(Fo2) + (0.0413P)2 + 1.6549P]
where P = (Fo2 + 2Fc2)/3
wR(F2) = 0.133(Δ/σ)max < 0.001
S = 1.32Δρmax = 0.37 e Å3
3499 reflectionsΔρmin = 0.25 e Å3
307 parameters
Crystal data top
C13H18N2O2V = 2505.5 (6) Å3
Mr = 234.29Z = 8
Orthorhombic, P212121Mo Kα radiation
a = 9.6423 (14) ŵ = 0.09 mm1
b = 11.4974 (17) ÅT = 100 K
c = 22.600 (3) Å0.43 × 0.23 × 0.23 mm
Data collection top
Bruker SMART APEX CCD
diffractometer
3499 independent reflections
Absorption correction: multi-scan
SADABS in SAINT-Plus (Bruker, 2003)
3403 reflections with I > 2σ(I)
Tmin = 0.965, Tmax = 0.981Rint = 0.041
25602 measured reflections
Refinement top
R[F2 > 2σ(F2)] = 0.0600 restraints
wR(F2) = 0.133H-atom parameters constrained
S = 1.32Δρmax = 0.37 e Å3
3499 reflectionsΔρmin = 0.25 e Å3
307 parameters
Special details top

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.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
O1A0.5275 (2)0.74524 (18)0.71574 (9)0.0200 (4)
C2A0.5986 (3)0.7897 (3)0.76134 (13)0.0176 (6)
O17A0.6692 (2)0.87684 (18)0.75304 (9)0.0213 (4)
N3A0.5897 (2)0.7389 (2)0.81457 (10)0.0170 (5)
H3A0.65120.76030.84120.02*
N4A0.4904 (2)0.6534 (2)0.83257 (10)0.0154 (5)
C5A0.3806 (3)0.6483 (2)0.78779 (12)0.0165 (5)
H5A0.32650.57520.79430.02*
C6A0.4435 (3)0.6429 (3)0.72638 (13)0.0191 (6)
H6A10.50150.57230.72270.023*
H6A20.36870.63850.69640.023*
C7A0.2806 (3)0.7517 (3)0.79456 (13)0.0206 (6)
H7A10.33170.82470.78650.025*
H7A20.20590.74470.76470.025*
C8A0.2163 (3)0.7588 (3)0.85530 (13)0.0189 (6)
C9A0.0827 (3)0.7173 (3)0.86541 (14)0.0232 (6)
H9A0.0310.6860.83330.028*
C10A0.0233 (3)0.7206 (3)0.92131 (15)0.0263 (7)
H10A0.06810.69210.92730.032*
C11A0.0976 (3)0.7656 (3)0.96826 (14)0.0251 (7)
H11A0.05840.76691.00680.03*
C12A0.2293 (3)0.8086 (3)0.95870 (15)0.0281 (7)
H12A0.28020.84070.99080.034*
C13A0.2878 (3)0.8053 (3)0.90287 (15)0.0249 (7)
H13A0.37860.83540.89710.03*
C14A0.5541 (3)0.5392 (2)0.84671 (13)0.0180 (6)
H14A0.57230.49530.80930.022*
C15A0.6894 (3)0.5566 (3)0.88013 (14)0.0250 (7)
H15A0.75470.59990.85520.037*
H15B0.72910.48080.89020.037*
H15C0.67140.60060.91650.037*
C16A0.4514 (4)0.4714 (3)0.88512 (15)0.0285 (7)
H16A0.36440.46060.86330.043*
H16B0.43310.51490.92160.043*
H16C0.49080.39520.8950.043*
O1B0.8672 (2)0.98233 (18)0.94720 (9)0.0218 (5)
C2B0.7980 (3)0.9425 (2)0.89999 (13)0.0175 (5)
O17B0.7047 (2)0.87193 (19)0.90751 (9)0.0221 (5)
N3B0.8282 (3)0.9856 (2)0.84613 (11)0.0187 (5)
H3B0.78240.9550.81630.022*
N4B0.9257 (3)1.0754 (2)0.83144 (11)0.0177 (5)
C5B0.9584 (3)1.1386 (2)0.88641 (13)0.0188 (6)
H5B1.04511.18410.87920.023*
C6B0.9879 (3)1.0537 (2)0.93632 (14)0.0200 (6)
H6B11.06761.00360.92560.024*
H6B21.01231.09710.97270.024*
C7B0.8430 (3)1.2258 (3)0.90152 (14)0.0216 (6)
H7B10.82721.27790.86730.026*
H7B20.75581.18320.90940.026*
C8B0.8812 (3)1.2979 (2)0.95530 (14)0.0205 (6)
C9B0.9766 (4)1.3882 (3)0.95059 (15)0.0261 (7)
H9B1.01291.40840.91290.031*
C10B1.0197 (4)1.4496 (3)1.00054 (16)0.0291 (7)
H10B1.08451.51140.99680.035*
C11B0.9680 (4)1.4202 (3)1.05520 (17)0.0325 (8)
H11B0.99781.46131.08940.039*
C12B0.8727 (4)1.3309 (3)1.06053 (16)0.0341 (8)
H12B0.83681.31081.09830.041*
C13B0.8296 (4)1.2707 (3)1.01068 (15)0.0286 (7)
H13B0.76361.20991.01460.034*
C14B1.0493 (3)1.0225 (3)0.80199 (13)0.0207 (6)
H14B1.09730.96920.83030.025*
C15B1.0028 (4)0.9540 (3)0.74778 (15)0.0255 (6)
H15D0.93940.89190.760.038*
H15E1.0840.91980.72830.038*
H15F0.95531.00620.72010.038*
C16B1.1483 (4)1.1180 (3)0.78295 (15)0.0320 (8)
H16D1.17881.16190.81780.048*
H16E1.1011.17050.75540.048*
H16F1.2291.08330.76340.048*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
O1A0.0219 (10)0.0205 (10)0.0176 (9)0.0022 (9)0.0014 (8)0.0017 (8)
C2A0.0151 (12)0.0162 (13)0.0215 (14)0.0042 (11)0.0003 (11)0.0015 (11)
O17A0.0237 (10)0.0186 (10)0.0217 (10)0.0034 (9)0.0026 (9)0.0017 (9)
N3A0.0147 (11)0.0186 (11)0.0178 (11)0.0011 (10)0.0048 (9)0.0007 (9)
N4A0.0146 (11)0.0122 (10)0.0193 (11)0.0005 (9)0.0011 (9)0.0018 (9)
C5A0.0141 (12)0.0171 (12)0.0182 (13)0.0037 (11)0.0020 (10)0.0000 (11)
C6A0.0199 (14)0.0189 (13)0.0185 (14)0.0034 (12)0.0037 (11)0.0001 (11)
C7A0.0178 (13)0.0234 (15)0.0207 (14)0.0031 (12)0.0033 (11)0.0025 (12)
C8A0.0175 (13)0.0149 (13)0.0243 (14)0.0059 (11)0.0035 (11)0.0008 (11)
C9A0.0196 (14)0.0234 (14)0.0267 (15)0.0036 (13)0.0054 (12)0.0021 (13)
C10A0.0217 (15)0.0255 (15)0.0317 (16)0.0036 (13)0.0020 (13)0.0049 (13)
C11A0.0286 (16)0.0246 (15)0.0221 (14)0.0080 (14)0.0000 (13)0.0029 (12)
C12A0.0248 (15)0.0331 (18)0.0265 (16)0.0082 (14)0.0089 (13)0.0110 (14)
C13A0.0147 (13)0.0271 (16)0.0329 (17)0.0028 (12)0.0013 (12)0.0063 (13)
C14A0.0232 (14)0.0139 (12)0.0169 (13)0.0039 (11)0.0021 (11)0.0013 (10)
C15A0.0276 (16)0.0234 (15)0.0239 (15)0.0076 (13)0.0055 (13)0.0013 (12)
C16A0.0364 (18)0.0229 (15)0.0262 (15)0.0040 (14)0.0032 (14)0.0086 (13)
O1B0.0249 (11)0.0187 (10)0.0218 (10)0.0014 (9)0.0009 (9)0.0005 (9)
C2B0.0183 (13)0.0134 (12)0.0207 (13)0.0045 (11)0.0003 (11)0.0028 (11)
O17B0.0254 (11)0.0210 (10)0.0197 (10)0.0059 (9)0.0037 (9)0.0019 (8)
N3B0.0194 (12)0.0183 (12)0.0185 (11)0.0044 (10)0.0018 (10)0.0001 (9)
N4B0.0174 (11)0.0136 (10)0.0222 (12)0.0026 (9)0.0005 (9)0.0021 (9)
C5B0.0183 (13)0.0146 (12)0.0233 (14)0.0044 (11)0.0033 (11)0.0017 (11)
C6B0.0190 (13)0.0160 (12)0.0249 (15)0.0004 (11)0.0045 (12)0.0010 (11)
C7B0.0202 (13)0.0159 (13)0.0286 (15)0.0020 (11)0.0040 (12)0.0003 (12)
C8B0.0190 (13)0.0141 (13)0.0284 (15)0.0063 (11)0.0065 (12)0.0013 (11)
C9B0.0283 (16)0.0179 (14)0.0319 (17)0.0011 (13)0.0076 (14)0.0023 (13)
C10B0.0257 (16)0.0160 (14)0.046 (2)0.0012 (13)0.0127 (15)0.0024 (14)
C11B0.0362 (19)0.0232 (15)0.0382 (19)0.0108 (15)0.0117 (16)0.0114 (14)
C12B0.0343 (18)0.0376 (19)0.0305 (17)0.0087 (16)0.0041 (15)0.0045 (15)
C13B0.0257 (15)0.0237 (17)0.0365 (18)0.0026 (14)0.0035 (14)0.0045 (14)
C14B0.0161 (13)0.0246 (14)0.0215 (14)0.0050 (12)0.0007 (11)0.0062 (12)
C15B0.0250 (14)0.0223 (14)0.0291 (15)0.0023 (13)0.0086 (12)0.0022 (13)
C16B0.0276 (16)0.045 (2)0.0236 (16)0.0147 (16)0.0054 (13)0.0039 (15)
Geometric parameters (Å, º) top
O1A—C2A1.339 (3)O1B—C2B1.339 (3)
O1A—C6A1.449 (3)O1B—C6B1.444 (4)
C2A—O17A1.226 (4)C2B—O17B1.223 (4)
C2A—N3A1.340 (4)C2B—N3B1.346 (4)
N3A—N4A1.431 (3)N3B—N4B1.435 (3)
N3A—H3A0.88N3B—H3B0.88
N4A—C5A1.466 (3)N4B—C5B1.474 (4)
N4A—C14A1.484 (3)N4B—C14B1.494 (4)
C5A—C6A1.516 (4)C5B—C6B1.519 (4)
C5A—C7A1.538 (4)C5B—C7B1.536 (4)
C5A—H5A1C5B—H5B1
C6A—H6A10.99C6B—H6B10.99
C6A—H6A20.99C6B—H6B20.99
C7A—C8A1.508 (4)C7B—C8B1.517 (4)
C7A—H7A10.99C7B—H7B10.99
C7A—H7A20.99C7B—H7B20.99
C8A—C13A1.385 (4)C8B—C13B1.383 (5)
C8A—C9A1.393 (4)C8B—C9B1.391 (4)
C9A—C10A1.388 (4)C9B—C10B1.394 (5)
C9A—H9A0.95C9B—H9B0.95
C10A—C11A1.381 (5)C10B—C11B1.374 (5)
C10A—H10A0.95C10B—H10B0.95
C11A—C12A1.380 (5)C11B—C12B1.383 (5)
C11A—H11A0.95C11B—H11B0.95
C12A—C13A1.383 (5)C12B—C13B1.386 (5)
C12A—H12A0.95C12B—H12B0.95
C13A—H13A0.95C13B—H13B0.95
C14A—C15A1.521 (4)C14B—C16B1.517 (4)
C14A—C16A1.530 (4)C14B—C15B1.524 (5)
C14A—H14A1C14B—H14B1
C15A—H15A0.98C15B—H15D0.98
C15A—H15B0.98C15B—H15E0.98
C15A—H15C0.98C15B—H15F0.98
C16A—H16A0.98C16B—H16D0.98
C16A—H16B0.98C16B—H16E0.98
C16A—H16C0.98C16B—H16F0.98
C2A—O1A—C6A117.9 (2)C2B—O1B—C6B117.4 (2)
O17A—C2A—O1A118.6 (3)O17B—C2B—O1B118.9 (3)
O17A—C2A—N3A121.9 (3)O17B—C2B—N3B121.9 (3)
O1A—C2A—N3A119.5 (3)O1B—C2B—N3B119.1 (3)
C2A—N3A—N4A126.7 (2)C2B—N3B—N4B128.0 (2)
C2A—N3A—H3A116.7C2B—N3B—H3B116
N4A—N3A—H3A116.7N4B—N3B—H3B116
N3A—N4A—C5A108.3 (2)N3B—N4B—C5B107.4 (2)
N3A—N4A—C14A113.1 (2)N3B—N4B—C14B109.5 (2)
C5A—N4A—C14A114.3 (2)C5B—N4B—C14B114.0 (2)
N4A—C5A—C6A110.2 (2)N4B—C5B—C6B110.4 (2)
N4A—C5A—C7A110.7 (2)N4B—C5B—C7B110.8 (2)
C6A—C5A—C7A111.9 (2)C6B—C5B—C7B113.0 (3)
N4A—C5A—H5A108N4B—C5B—H5B107.5
C6A—C5A—H5A108C6B—C5B—H5B107.5
C7A—C5A—H5A108C7B—C5B—H5B107.5
O1A—C6A—C5A110.1 (2)O1B—C6B—C5B109.9 (2)
O1A—C6A—H6A1109.6O1B—C6B—H6B1109.7
C5A—C6A—H6A1109.6C5B—C6B—H6B1109.7
O1A—C6A—H6A2109.6O1B—C6B—H6B2109.7
C5A—C6A—H6A2109.6C5B—C6B—H6B2109.7
H6A1—C6A—H6A2108.2H6B1—C6B—H6B2108.2
C8A—C7A—C5A112.9 (2)C8B—C7B—C5B111.1 (2)
C8A—C7A—H7A1109C8B—C7B—H7B1109.4
C5A—C7A—H7A1109C5B—C7B—H7B1109.4
C8A—C7A—H7A2109C8B—C7B—H7B2109.4
C5A—C7A—H7A2109C5B—C7B—H7B2109.4
H7A1—C7A—H7A2107.8H7B1—C7B—H7B2108
C13A—C8A—C9A117.8 (3)C13B—C8B—C9B118.4 (3)
C13A—C8A—C7A121.5 (3)C13B—C8B—C7B120.9 (3)
C9A—C8A—C7A120.7 (3)C9B—C8B—C7B120.5 (3)
C10A—C9A—C8A121.4 (3)C8B—C9B—C10B120.8 (3)
C10A—C9A—H9A119.3C8B—C9B—H9B119.6
C8A—C9A—H9A119.3C10B—C9B—H9B119.6
C11A—C10A—C9A119.7 (3)C11B—C10B—C9B119.7 (3)
C11A—C10A—H10A120.1C11B—C10B—H10B120.2
C9A—C10A—H10A120.1C9B—C10B—H10B120.2
C12A—C11A—C10A119.4 (3)C10B—C11B—C12B120.1 (3)
C12A—C11A—H11A120.3C10B—C11B—H11B119.9
C10A—C11A—H11A120.3C12B—C11B—H11B119.9
C11A—C12A—C13A120.6 (3)C11B—C12B—C13B119.9 (3)
C11A—C12A—H12A119.7C11B—C12B—H12B120
C13A—C12A—H12A119.7C13B—C12B—H12B120
C12A—C13A—C8A121.0 (3)C8B—C13B—C12B121.0 (3)
C12A—C13A—H13A119.5C8B—C13B—H13B119.5
C8A—C13A—H13A119.5C12B—C13B—H13B119.5
N4A—C14A—C15A110.2 (2)N4B—C14B—C16B109.5 (3)
N4A—C14A—C16A107.8 (2)N4B—C14B—C15B109.5 (2)
C15A—C14A—C16A109.9 (2)C16B—C14B—C15B109.3 (3)
N4A—C14A—H14A109.7N4B—C14B—H14B109.5
C15A—C14A—H14A109.7C16B—C14B—H14B109.5
C16A—C14A—H14A109.7C15B—C14B—H14B109.5
C14A—C15A—H15A109.5C14B—C15B—H15D109.5
C14A—C15A—H15B109.5C14B—C15B—H15E109.5
H15A—C15A—H15B109.5H15D—C15B—H15E109.5
C14A—C15A—H15C109.5C14B—C15B—H15F109.5
H15A—C15A—H15C109.5H15D—C15B—H15F109.5
H15B—C15A—H15C109.5H15E—C15B—H15F109.5
C14A—C16A—H16A109.5C14B—C16B—H16D109.5
C14A—C16A—H16B109.5C14B—C16B—H16E109.5
H16A—C16A—H16B109.5H16D—C16B—H16E109.5
C14A—C16A—H16C109.5C14B—C16B—H16F109.5
H16A—C16A—H16C109.5H16D—C16B—H16F109.5
H16B—C16A—H16C109.5H16E—C16B—H16F109.5
C6A—O1A—C2A—O17A179.4 (2)C6B—O1B—C2B—O17B172.3 (2)
C6A—O1A—C2A—N3A0.1 (4)C6B—O1B—C2B—N3B11.2 (4)
O17A—C2A—N3A—N4A166.0 (3)O17B—C2B—N3B—N4B174.2 (3)
O1A—C2A—N3A—N4A13.3 (4)O1B—C2B—N3B—N4B2.2 (4)
C2A—N3A—N4A—C5A12.3 (4)C2B—N3B—N4B—C5B17.0 (4)
C2A—N3A—N4A—C14A115.5 (3)C2B—N3B—N4B—C14B107.2 (3)
N3A—N4A—C5A—C6A47.0 (3)N3B—N4B—C5B—C6B46.5 (3)
C14A—N4A—C5A—C6A80.2 (3)C14B—N4B—C5B—C6B75.0 (3)
N3A—N4A—C5A—C7A77.3 (3)N3B—N4B—C5B—C7B79.5 (3)
C14A—N4A—C5A—C7A155.5 (2)C14B—N4B—C5B—C7B159.1 (2)
C2A—O1A—C6A—C5A35.5 (3)C2B—O1B—C6B—C5B41.9 (3)
N4A—C5A—C6A—O1A60.1 (3)N4B—C5B—C6B—O1B61.0 (3)
C7A—C5A—C6A—O1A63.5 (3)C7B—C5B—C6B—O1B63.7 (3)
N4A—C5A—C7A—C8A56.9 (3)N4B—C5B—C7B—C8B175.5 (2)
C6A—C5A—C7A—C8A179.9 (2)C6B—C5B—C7B—C8B60.0 (3)
C5A—C7A—C8A—C13A79.7 (4)C5B—C7B—C8B—C13B99.3 (3)
C5A—C7A—C8A—C9A99.6 (3)C5B—C7B—C8B—C9B76.3 (3)
C13A—C8A—C9A—C10A0.9 (5)C13B—C8B—C9B—C10B0.3 (5)
C7A—C8A—C9A—C10A178.4 (3)C7B—C8B—C9B—C10B175.4 (3)
C8A—C9A—C10A—C11A0.2 (5)C8B—C9B—C10B—C11B0.4 (5)
C9A—C10A—C11A—C12A1.1 (5)C9B—C10B—C11B—C12B0.6 (5)
C10A—C11A—C12A—C13A1.0 (5)C10B—C11B—C12B—C13B0.2 (5)
C11A—C12A—C13A—C8A0.2 (5)C9B—C8B—C13B—C12B0.7 (5)
C9A—C8A—C13A—C12A1.1 (5)C7B—C8B—C13B—C12B175.0 (3)
C7A—C8A—C13A—C12A178.3 (3)C11B—C12B—C13B—C8B0.5 (5)
N3A—N4A—C14A—C15A40.3 (3)N3B—N4B—C14B—C16B176.4 (2)
C5A—N4A—C14A—C15A164.9 (2)C5B—N4B—C14B—C16B63.2 (3)
N3A—N4A—C14A—C16A160.2 (2)N3B—N4B—C14B—C15B56.5 (3)
C5A—N4A—C14A—C16A75.2 (3)C5B—N4B—C14B—C15B176.9 (2)

Experimental details

Crystal data
Chemical formulaC13H18N2O2
Mr234.29
Crystal system, space groupOrthorhombic, P212121
Temperature (K)100
a, b, c (Å)9.6423 (14), 11.4974 (17), 22.600 (3)
V3)2505.5 (6)
Z8
Radiation typeMo Kα
µ (mm1)0.09
Crystal size (mm)0.43 × 0.23 × 0.23
Data collection
DiffractometerBruker SMART APEX CCD
diffractometer
Absorption correctionMulti-scan
SADABS in SAINT-Plus (Bruker, 2003)
Tmin, Tmax0.965, 0.981
No. of measured, independent and
observed [I > 2σ(I)] reflections
25602, 3499, 3403
Rint0.041
(sin θ/λ)max1)0.667
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.060, 0.133, 1.32
No. of reflections3499
No. of parameters307
H-atom treatmentH-atom parameters constrained
Δρmax, Δρmin (e Å3)0.37, 0.25

Computer programs: SMART (Bruker, 2003), SAINT-Plus (Bruker, 2003), SIR2004 (Burla et al., 2005), SHELXL97 (Sheldrick, 2008), ORTEP-3 for Windows (Farrugia, 1997) and Mercury (Macrae et al., 2006), WinGX (Farrugia, 1999) and publCIF (Westrip, 2008).

Selected geometric parameters (Å, º) top
C2A—N3A1.340 (4)C2B—N3B1.346 (4)
C14A—N4A—C5A—C7A155.5 (2)C14B—N4B—C5B—C7B159.1 (2)
 

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