organic compounds
N′-(2,6-dimethylphenyl)benzenecarboximidamide tetrahydrofuran monosolvate
ofaInstitute of Applied Chemistry, Shanxi University, Taiyuan 030006, People's Republic of China
*Correspondence e-mail: sdbai@sxu.edu.cn
The 15H16N2·C4H8O, contains two amidine molecules (A and B) with slightly different conformations and two tetrahydrofuran (THF) solvent molecules. In the amidine molecules, the dimethylphenyl ring and the NH2 group lie to the same side of the N=C bond and the dihedral angles between the aromatic rings are 54.25 (7) (molecule A) and 58.88 (6) ° (molecule B). In the crystal, N—H⋯N hydrogen bonds link the amidine molecules into [100] C(4) chains of alternating A and B molecules. Both amidine molecules form an N—H⋯O hydrogen bond to an adjacent THF solvent molecule.
of the title compound, CCCDC reference: 1036842
1. Related literature
For reviews of related metal amidinates and their applications in ); Bai et al. (2013); Qian et al. (2010); Bakthavachalam et al. (2014). For a related synthetic method for see: Liu et al. (2013). For a related see Zhang & Tong (2008).
see: Edelmann (19942. Experimental
2.1. Crystal data
|
2.3. Refinement
|
|
Data collection: SMART (Bruker, 2000); cell SAINT (Bruker, 2000); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL/PC (Sheldrick, 2008); software used to prepare material for publication: SHELXL97.
Supporting information
CCDC reference: 1036842
https://doi.org/10.1107/S2056989014026255/hb7332sup1.cif
contains datablocks I, New_Global_Publ_Block. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S2056989014026255/hb7332Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S2056989014026255/hb7332Isup3.cml
A solution of LiBun (2.2 M, 2.27 ml, 5.0 mmol) in hexane was slowly added into a stirred solution of 2,6-dimethylaniline (0.62 ml, 5.0 mmol) in Et2O(ca 30 ml) by syringe at 273 K. The reaction mixture was warmed to room temperature and kept stirring for 3 h. Then benzonitrile (0.51 ml, 5.0 mmol) was added by syringe at 273 K. The reaction mixture was warmed to room temperature and kept stirring for 4 h. H2O (0.09 ml, 5.0 mmol) was added by syringe at 273 K. After stirred at room temperature for 4 h, the mixture was filtered and the filtrate was dried in vacuum to remove all volatiles. The residue was crystallized in hexane and gave colorless crystals, which was recrystallized from THF solution to give colorless blocks of the title compound (yield 1.17 g, 79%).1H NMR (300 MHz, CDCl3): δ = 7.97–6.91 (m, 8H; phenyl), 4.62 (s, 2H; NH2), 2.19 (s, 6; CH3). 13C NMR (75 MHz, CDCl3): δ = 135.8–122.9 (Ph), 18.0 (CH3).
The methyl H atoms were constrained to an ideal geometry, with C—H distances of 0.98° and Uiso(H) = 1.5Ueq(C), but each group was allowed to rotate freely about its C—C bond. The methylene H atoms were constrained with C—H distances of 0.99° and Uiso(H) = 1.2Ueq(C). The phenyl H atoms were placed in geometrically idealized positions and constrained to ride on their parent atoms, with C—H distances of 0.95° and Uiso(H) =1.2Ueq(C).
Amidinate anions of the general formula [RC(NR')2]- are the nitrogen analogs of the carboxylate anions. Their steric and electronic properties can be readily modified in a wide range through variation of the substituents on the carbon and nitrogen atoms. They have been widely employed as ligands in main group and transition metal coordination chemistry (Edelmann, 1994). Deprotonation of an amidine using a metal alkyl is a general synthetic method for preparing metal amidinato complexes, which could act as catalysts in
of and (Qian et al., 2010; Bakthavachalam et al., 2014). Herein we report the of the title compound prepared by a one pot reaction with 2,6-dimethylaniline, LiBun, PhCN and H2O.The
of the title compound contains two and two tetrahydronfuran molecules. Amidine molecules denoted A and B in the possess different orientations. In molecule A, the phenyl ring C10—C15 and dimethylphenyl ring C1—C6 are twisted from the mean plane of N1/C9/N2 by 26.14 (18)° and 79.50 (8)°. Two N atoms connect the central C atom in different lengths of 1.293 (2) Å and 1.346 (2) Å, respectively. In molecule B, the phenyl ring C25—C30 and dimethylphenyl ring C16—C21 are twisted from the mean plane of N3/C24/N4 by 28.21 (18)° and 86.33 (8)°. Two N atoms connect the central C atom in different lengths of 1.288 (2) Å and 1.354 (2) Å. In the crystal, the intermolecular N—H···N hydrogen bonds link the molecules to give a one-dimension chain extending along the a-axis direction. The tetrahydrofuran molecules interact with the amidine chain via N—H···O hydrogen bonds. The compound is closely similar to the benzamidine with an o-tolyl substituent on the N atom, namely N2-o-Tolylbenzamidine (Zhang et al., 2008), which has no tetrahydrofuran molecules attached.For reviews of related metal amidinates and their applications in
see: Edelmann (1994); Bai et al. (2013); Qian et al. (2010); Bakthavachalam et al. (2014). For a related synthetic method for see: Liu et al. (2013). For a related see Zhang & Tong (2008).Data collection: SMART (Bruker, 2000); cell
SAINT (Bruker, 2000); data reduction: SAINT (Bruker, 2000); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL/PC (Sheldrick, 2008); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).C15H16N2·C4H8O | F(000) = 1280 |
Mr = 296.40 | Dx = 1.110 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
a = 10.075 (4) Å | Cell parameters from 1838 reflections |
b = 14.549 (6) Å | θ = 2.5–23.2° |
c = 24.208 (8) Å | µ = 0.07 mm−1 |
β = 90.662 (8)° | T = 200 K |
V = 3548 (2) Å3 | Block, colorless |
Z = 8 | 0.30 × 0.30 × 0.25 mm |
Bruker SMART CCD diffractometer | 6239 independent reflections |
Radiation source: fine-focus sealed tube | 2958 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.076 |
φ and ω scan | θmax = 25.0°, θmin = 1.6° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −11→11 |
Tmin = 0.980, Tmax = 0.983 | k = −17→17 |
19431 measured reflections | l = −15→28 |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.054 | H-atom parameters constrained |
wR(F2) = 0.159 | w = 1/[σ2(Fo2) + (0.0633P)2 + 0.1551P] where P = (Fo2 + 2Fc2)/3 |
S = 1.00 | (Δ/σ)max < 0.001 |
6239 reflections | Δρmax = 0.19 e Å−3 |
402 parameters | Δρmin = −0.16 e Å−3 |
1 restraint | Extinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.0052 (7) |
C15H16N2·C4H8O | V = 3548 (2) Å3 |
Mr = 296.40 | Z = 8 |
Monoclinic, P21/c | Mo Kα radiation |
a = 10.075 (4) Å | µ = 0.07 mm−1 |
b = 14.549 (6) Å | T = 200 K |
c = 24.208 (8) Å | 0.30 × 0.30 × 0.25 mm |
β = 90.662 (8)° |
Bruker SMART CCD diffractometer | 6239 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 2958 reflections with I > 2σ(I) |
Tmin = 0.980, Tmax = 0.983 | Rint = 0.076 |
19431 measured reflections |
R[F2 > 2σ(F2)] = 0.054 | 1 restraint |
wR(F2) = 0.159 | H-atom parameters constrained |
S = 1.00 | Δρmax = 0.19 e Å−3 |
6239 reflections | Δρmin = −0.16 e Å−3 |
402 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. |
Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger. |
x | y | z | Uiso*/Ueq | ||
N1 | 0.38595 (19) | 0.73562 (14) | 0.38856 (8) | 0.0489 (6) | |
N2 | 0.6122 (2) | 0.69654 (16) | 0.39181 (9) | 0.0635 (7) | |
H2A | 0.6220 | 0.7139 | 0.4265 | 0.076* | |
H2B | 0.6803 | 0.6743 | 0.3737 | 0.076* | |
N3 | 0.88493 (19) | 0.64602 (14) | 0.33988 (8) | 0.0512 (6) | |
N4 | 1.1129 (2) | 0.65628 (15) | 0.35904 (9) | 0.0680 (7) | |
H4A | 1.1280 | 0.5992 | 0.3488 | 0.082* | |
H4B | 1.1788 | 0.6909 | 0.3709 | 0.082* | |
C1 | 0.3862 (2) | 0.77187 (18) | 0.44302 (11) | 0.0478 (7) | |
C2 | 0.3850 (3) | 0.86787 (19) | 0.44921 (12) | 0.0580 (7) | |
C3 | 0.3632 (3) | 0.9046 (2) | 0.50151 (15) | 0.0748 (9) | |
H3 | 0.3627 | 0.9694 | 0.5062 | 0.090* | |
C4 | 0.3425 (3) | 0.8487 (3) | 0.54637 (14) | 0.0863 (11) | |
H4 | 0.3248 | 0.8746 | 0.5815 | 0.104* | |
C5 | 0.3475 (3) | 0.7550 (3) | 0.53989 (13) | 0.0826 (10) | |
H5 | 0.3354 | 0.7168 | 0.5712 | 0.099* | |
C6 | 0.3699 (3) | 0.7143 (2) | 0.48870 (12) | 0.0612 (8) | |
C7 | 0.4045 (3) | 0.9291 (2) | 0.39988 (13) | 0.0851 (10) | |
H7A | 0.4005 | 0.9936 | 0.4115 | 0.128* | |
H7B | 0.3345 | 0.9171 | 0.3724 | 0.128* | |
H7C | 0.4913 | 0.9165 | 0.3836 | 0.128* | |
C8 | 0.3732 (3) | 0.6115 (2) | 0.48238 (13) | 0.0922 (11) | |
H8A | 0.2986 | 0.5917 | 0.4589 | 0.138* | |
H8B | 0.3663 | 0.5826 | 0.5188 | 0.138* | |
H8C | 0.4568 | 0.5932 | 0.4653 | 0.138* | |
C9 | 0.4927 (3) | 0.70415 (17) | 0.36643 (10) | 0.0455 (6) | |
C10 | 0.4851 (2) | 0.67278 (17) | 0.30779 (11) | 0.0478 (7) | |
C11 | 0.3895 (3) | 0.7092 (2) | 0.27270 (12) | 0.0623 (8) | |
H11 | 0.3302 | 0.7545 | 0.2861 | 0.075* | |
C12 | 0.3790 (3) | 0.6804 (2) | 0.21812 (13) | 0.0826 (10) | |
H12 | 0.3125 | 0.7058 | 0.1945 | 0.099* | |
C13 | 0.4645 (3) | 0.6154 (3) | 0.19833 (13) | 0.0857 (10) | |
H13 | 0.4579 | 0.5961 | 0.1609 | 0.103* | |
C14 | 0.5598 (3) | 0.5782 (2) | 0.23253 (14) | 0.0805 (10) | |
H14 | 0.6188 | 0.5329 | 0.2189 | 0.097* | |
C15 | 0.5697 (3) | 0.6067 (2) | 0.28703 (12) | 0.0643 (8) | |
H15 | 0.6357 | 0.5805 | 0.3105 | 0.077* | |
C16 | 0.8975 (2) | 0.55500 (18) | 0.31850 (12) | 0.0513 (7) | |
C17 | 0.8837 (3) | 0.4790 (2) | 0.35303 (13) | 0.0647 (8) | |
C18 | 0.8782 (3) | 0.3913 (2) | 0.32926 (18) | 0.0841 (10) | |
H18 | 0.8693 | 0.3390 | 0.3525 | 0.101* | |
C19 | 0.8853 (3) | 0.3794 (2) | 0.27344 (19) | 0.0861 (11) | |
H19 | 0.8800 | 0.3194 | 0.2581 | 0.103* | |
C20 | 0.9001 (3) | 0.4541 (2) | 0.23951 (15) | 0.0768 (9) | |
H20 | 0.9051 | 0.4453 | 0.2007 | 0.092* | |
C21 | 0.9080 (2) | 0.5430 (2) | 0.26115 (13) | 0.0608 (8) | |
C22 | 0.8773 (4) | 0.4925 (2) | 0.41468 (14) | 0.1000 (11) | |
H22A | 0.8666 | 0.4327 | 0.4328 | 0.150* | |
H22B | 0.8016 | 0.5320 | 0.4235 | 0.150* | |
H22C | 0.9595 | 0.5215 | 0.4279 | 0.150* | |
C23 | 0.9254 (4) | 0.6242 (2) | 0.22403 (12) | 0.0913 (11) | |
H23A | 0.8530 | 0.6680 | 0.2299 | 0.137* | |
H23B | 0.9242 | 0.6039 | 0.1854 | 0.137* | |
H23C | 1.0105 | 0.6540 | 0.2324 | 0.137* | |
C24 | 0.9884 (2) | 0.69064 (17) | 0.35657 (10) | 0.0479 (6) | |
C25 | 0.9695 (2) | 0.78779 (17) | 0.37466 (11) | 0.0479 (7) | |
C26 | 1.0508 (3) | 0.82922 (19) | 0.41377 (12) | 0.0631 (8) | |
H26 | 1.1229 | 0.7957 | 0.4294 | 0.076* | |
C27 | 1.0285 (3) | 0.9193 (2) | 0.43048 (14) | 0.0789 (9) | |
H27 | 1.0849 | 0.9467 | 0.4575 | 0.095* | |
C28 | 0.9254 (3) | 0.9687 (2) | 0.40811 (15) | 0.0810 (10) | |
H28 | 0.9104 | 1.0303 | 0.4195 | 0.097* | |
C29 | 0.8436 (3) | 0.9287 (2) | 0.36907 (13) | 0.0735 (9) | |
H29 | 0.7716 | 0.9626 | 0.3536 | 0.088* | |
C30 | 0.8659 (3) | 0.83899 (19) | 0.35218 (12) | 0.0612 (8) | |
H30 | 0.8096 | 0.8122 | 0.3249 | 0.073* | |
C31 | 0.2488 (4) | 0.4339 (4) | 0.2957 (2) | 0.1365 (17) | |
H31A | 0.2651 | 0.4871 | 0.2712 | 0.164* | |
H31B | 0.1603 | 0.4083 | 0.2863 | 0.164* | |
C32 | 0.3484 (5) | 0.3654 (3) | 0.2872 (2) | 0.1356 (17) | |
H32A | 0.3986 | 0.3784 | 0.2532 | 0.163* | |
H32B | 0.3077 | 0.3037 | 0.2839 | 0.163* | |
C33 | 0.4359 (5) | 0.3701 (3) | 0.3359 (2) | 0.1303 (15) | |
H33A | 0.5266 | 0.3888 | 0.3253 | 0.156* | |
H33B | 0.4406 | 0.3098 | 0.3547 | 0.156* | |
C34 | 0.3747 (5) | 0.4403 (3) | 0.37231 (17) | 0.1204 (14) | |
H34A | 0.3646 | 0.4156 | 0.4101 | 0.144* | |
H34B | 0.4313 | 0.4959 | 0.3743 | 0.144* | |
C35 | 0.8550 (5) | 0.6907 (3) | 0.5224 (2) | 0.1243 (15) | |
H35A | 0.9129 | 0.6905 | 0.4896 | 0.149* | |
H35B | 0.8520 | 0.6277 | 0.5378 | 0.149* | |
C36 | 0.9064 (5) | 0.7568 (4) | 0.5648 (2) | 0.1462 (18) | |
H36A | 0.9141 | 0.7269 | 0.6014 | 0.175* | |
H36B | 0.9945 | 0.7808 | 0.5543 | 0.175* | |
C37 | 0.8081 (5) | 0.8308 (3) | 0.5658 (2) | 0.1511 (19) | |
H37A | 0.7645 | 0.8332 | 0.6022 | 0.181* | |
H37B | 0.8511 | 0.8908 | 0.5589 | 0.181* | |
C38 | 0.7154 (4) | 0.8113 (3) | 0.5243 (2) | 0.1309 (16) | |
H38A | 0.6248 | 0.8226 | 0.5381 | 0.157* | |
H38B | 0.7302 | 0.8523 | 0.4923 | 0.157* | |
O1 | 0.2509 (3) | 0.4619 (2) | 0.34960 (16) | 0.1421 (12) | |
O2 | 0.7271 (3) | 0.7206 (2) | 0.50790 (11) | 0.1237 (10) |
U11 | U22 | U33 | U12 | U13 | U23 | |
N1 | 0.0377 (13) | 0.0606 (14) | 0.0482 (14) | 0.0003 (10) | −0.0005 (10) | −0.0089 (11) |
N2 | 0.0381 (14) | 0.0985 (19) | 0.0536 (15) | 0.0037 (12) | −0.0051 (11) | −0.0178 (13) |
N3 | 0.0396 (13) | 0.0502 (13) | 0.0638 (15) | 0.0000 (10) | −0.0013 (11) | −0.0106 (11) |
N4 | 0.0374 (14) | 0.0586 (15) | 0.1079 (19) | 0.0003 (11) | −0.0044 (12) | −0.0200 (13) |
C1 | 0.0341 (15) | 0.0596 (18) | 0.0498 (18) | 0.0002 (12) | 0.0003 (12) | −0.0029 (15) |
C2 | 0.0462 (17) | 0.062 (2) | 0.066 (2) | 0.0009 (13) | −0.0073 (14) | −0.0112 (16) |
C3 | 0.064 (2) | 0.078 (2) | 0.082 (3) | 0.0058 (16) | −0.0124 (18) | −0.029 (2) |
C4 | 0.076 (2) | 0.122 (3) | 0.060 (2) | 0.019 (2) | −0.0083 (18) | −0.029 (2) |
C5 | 0.075 (2) | 0.113 (3) | 0.060 (2) | 0.011 (2) | 0.0049 (17) | 0.003 (2) |
C6 | 0.0533 (18) | 0.074 (2) | 0.056 (2) | 0.0007 (15) | 0.0007 (14) | −0.0007 (17) |
C7 | 0.093 (3) | 0.062 (2) | 0.101 (3) | −0.0047 (17) | 0.003 (2) | 0.0069 (18) |
C8 | 0.106 (3) | 0.081 (3) | 0.089 (3) | 0.000 (2) | 0.017 (2) | 0.0199 (19) |
C9 | 0.0378 (16) | 0.0505 (16) | 0.0482 (17) | −0.0052 (12) | −0.0005 (13) | 0.0014 (12) |
C10 | 0.0348 (15) | 0.0565 (16) | 0.0520 (18) | −0.0022 (12) | −0.0008 (13) | −0.0052 (14) |
C11 | 0.0552 (19) | 0.077 (2) | 0.054 (2) | 0.0126 (15) | −0.0001 (15) | −0.0026 (16) |
C12 | 0.079 (2) | 0.112 (3) | 0.057 (2) | 0.022 (2) | −0.0140 (17) | −0.0053 (19) |
C13 | 0.075 (2) | 0.125 (3) | 0.057 (2) | 0.009 (2) | −0.0085 (19) | −0.027 (2) |
C14 | 0.059 (2) | 0.108 (3) | 0.074 (2) | 0.0180 (18) | −0.0073 (18) | −0.037 (2) |
C15 | 0.0450 (18) | 0.082 (2) | 0.066 (2) | 0.0082 (15) | −0.0097 (15) | −0.0193 (16) |
C16 | 0.0308 (15) | 0.0516 (17) | 0.071 (2) | −0.0002 (12) | 0.0004 (13) | −0.0054 (15) |
C17 | 0.0475 (18) | 0.064 (2) | 0.083 (2) | −0.0028 (14) | 0.0045 (15) | 0.0017 (18) |
C18 | 0.065 (2) | 0.058 (2) | 0.129 (3) | −0.0055 (16) | 0.001 (2) | 0.003 (2) |
C19 | 0.062 (2) | 0.063 (2) | 0.133 (4) | 0.0011 (17) | −0.007 (2) | −0.024 (2) |
C20 | 0.056 (2) | 0.083 (3) | 0.092 (3) | 0.0080 (17) | −0.0096 (17) | −0.030 (2) |
C21 | 0.0434 (17) | 0.064 (2) | 0.075 (2) | 0.0049 (13) | −0.0011 (15) | −0.0091 (17) |
C22 | 0.109 (3) | 0.093 (3) | 0.098 (3) | 0.004 (2) | 0.021 (2) | 0.022 (2) |
C23 | 0.111 (3) | 0.091 (3) | 0.072 (2) | 0.001 (2) | 0.004 (2) | −0.0036 (19) |
C24 | 0.0383 (16) | 0.0513 (16) | 0.0542 (17) | −0.0001 (13) | 0.0033 (13) | −0.0029 (13) |
C25 | 0.0381 (15) | 0.0484 (16) | 0.0572 (18) | −0.0026 (13) | 0.0051 (13) | −0.0027 (13) |
C26 | 0.0473 (17) | 0.064 (2) | 0.078 (2) | 0.0008 (14) | −0.0035 (15) | −0.0159 (16) |
C27 | 0.058 (2) | 0.076 (2) | 0.103 (3) | −0.0021 (17) | −0.0027 (18) | −0.0324 (19) |
C28 | 0.068 (2) | 0.061 (2) | 0.115 (3) | 0.0013 (18) | 0.016 (2) | −0.020 (2) |
C29 | 0.061 (2) | 0.059 (2) | 0.101 (3) | 0.0092 (16) | −0.0016 (18) | −0.0033 (18) |
C30 | 0.0516 (18) | 0.0562 (18) | 0.076 (2) | 0.0014 (15) | −0.0028 (15) | 0.0004 (15) |
C31 | 0.102 (4) | 0.165 (5) | 0.142 (4) | 0.045 (3) | −0.016 (3) | −0.031 (4) |
C32 | 0.114 (4) | 0.128 (4) | 0.164 (4) | 0.035 (3) | −0.044 (3) | −0.059 (3) |
C33 | 0.118 (4) | 0.114 (4) | 0.157 (4) | 0.031 (3) | −0.034 (3) | −0.018 (3) |
C34 | 0.147 (4) | 0.105 (3) | 0.109 (3) | −0.014 (3) | −0.006 (3) | −0.014 (3) |
C35 | 0.129 (4) | 0.114 (4) | 0.131 (4) | 0.030 (3) | 0.026 (3) | 0.011 (3) |
C36 | 0.111 (4) | 0.185 (5) | 0.142 (4) | 0.024 (4) | −0.057 (3) | −0.008 (4) |
C37 | 0.139 (4) | 0.130 (4) | 0.182 (5) | 0.015 (3) | −0.076 (4) | −0.044 (4) |
C38 | 0.114 (4) | 0.108 (4) | 0.170 (4) | 0.014 (3) | −0.054 (3) | −0.020 (3) |
O1 | 0.126 (3) | 0.144 (3) | 0.156 (3) | 0.042 (2) | −0.002 (2) | −0.048 (2) |
O2 | 0.141 (3) | 0.115 (2) | 0.114 (2) | 0.010 (2) | −0.0445 (19) | −0.0314 (17) |
N1—C9 | 1.291 (3) | C20—C21 | 1.397 (4) |
N1—C1 | 1.420 (3) | C20—H20 | 0.9500 |
N2—C9 | 1.350 (3) | C21—C23 | 1.497 (4) |
N2—H2A | 0.8800 | C22—H22A | 0.9800 |
N2—H2B | 0.8800 | C22—H22B | 0.9800 |
N3—C24 | 1.289 (3) | C22—H22C | 0.9800 |
N3—C16 | 1.428 (3) | C23—H23A | 0.9800 |
N4—C24 | 1.351 (3) | C23—H23B | 0.9800 |
N4—H4A | 0.8800 | C23—H23C | 0.9800 |
N4—H4B | 0.8800 | C24—C25 | 1.493 (3) |
C1—C6 | 1.399 (4) | C25—C26 | 1.383 (3) |
C1—C2 | 1.405 (4) | C25—C30 | 1.388 (3) |
C2—C3 | 1.394 (4) | C26—C27 | 1.391 (4) |
C2—C7 | 1.505 (4) | C26—H26 | 0.9500 |
C3—C4 | 1.374 (4) | C27—C28 | 1.369 (4) |
C3—H3 | 0.9500 | C27—H27 | 0.9500 |
C4—C5 | 1.373 (5) | C28—C29 | 1.376 (4) |
C4—H4 | 0.9500 | C28—H28 | 0.9500 |
C5—C6 | 1.394 (4) | C29—C30 | 1.387 (4) |
C5—H5 | 0.9500 | C29—H29 | 0.9500 |
C6—C8 | 1.504 (4) | C30—H30 | 0.9500 |
C7—H7A | 0.9800 | C31—O1 | 1.367 (4) |
C7—H7B | 0.9800 | C31—C32 | 1.431 (5) |
C7—H7C | 0.9800 | C31—H31A | 0.9900 |
C8—H8A | 0.9800 | C31—H31B | 0.9900 |
C8—H8B | 0.9800 | C32—C33 | 1.465 (5) |
C8—H8C | 0.9800 | C32—H32A | 0.9900 |
C9—C10 | 1.492 (3) | C32—H32B | 0.9900 |
C10—C15 | 1.383 (3) | C33—C34 | 1.488 (5) |
C10—C11 | 1.383 (3) | C33—H33A | 0.9900 |
C11—C12 | 1.389 (4) | C33—H33B | 0.9900 |
C11—H11 | 0.9500 | C34—O1 | 1.393 (5) |
C12—C13 | 1.370 (4) | C34—H34A | 0.9900 |
C12—H12 | 0.9500 | C34—H34B | 0.9900 |
C13—C14 | 1.371 (4) | C35—O2 | 1.401 (5) |
C13—H13 | 0.9500 | C35—C36 | 1.496 (6) |
C14—C15 | 1.386 (4) | C35—H35A | 0.9900 |
C14—H14 | 0.9500 | C35—H35B | 0.9900 |
C15—H15 | 0.9500 | C36—C37 | 1.462 (6) |
C16—C17 | 1.394 (4) | C36—H36A | 0.9900 |
C16—C21 | 1.404 (4) | C36—H36B | 0.9900 |
C17—C18 | 1.400 (4) | C37—C38 | 1.393 (5) |
C17—C22 | 1.507 (4) | C37—H37A | 0.9900 |
C18—C19 | 1.365 (4) | C37—H37B | 0.9900 |
C18—H18 | 0.9500 | C38—O2 | 1.384 (4) |
C19—C20 | 1.372 (4) | C38—H38A | 0.9900 |
C19—H19 | 0.9500 | C38—H38B | 0.9900 |
C9—N1—C1 | 121.6 (2) | C17—C22—H22C | 109.5 |
C9—N2—H2A | 120.0 | H22A—C22—H22C | 109.5 |
C9—N2—H2B | 120.0 | H22B—C22—H22C | 109.5 |
H2A—N2—H2B | 120.0 | C21—C23—H23A | 109.5 |
C24—N3—C16 | 120.4 (2) | C21—C23—H23B | 109.5 |
C24—N4—H4A | 120.0 | H23A—C23—H23B | 109.5 |
C24—N4—H4B | 120.0 | C21—C23—H23C | 109.5 |
H4A—N4—H4B | 120.0 | H23A—C23—H23C | 109.5 |
C6—C1—C2 | 120.7 (3) | H23B—C23—H23C | 109.5 |
C6—C1—N1 | 120.8 (2) | N3—C24—N4 | 125.1 (2) |
C2—C1—N1 | 117.9 (2) | N3—C24—C25 | 117.6 (2) |
C3—C2—C1 | 118.7 (3) | N4—C24—C25 | 117.3 (2) |
C3—C2—C7 | 121.2 (3) | C26—C25—C30 | 118.1 (2) |
C1—C2—C7 | 120.2 (3) | C26—C25—C24 | 122.5 (2) |
C4—C3—C2 | 121.2 (3) | C30—C25—C24 | 119.4 (2) |
C4—C3—H3 | 119.4 | C25—C26—C27 | 120.9 (3) |
C2—C3—H3 | 119.4 | C25—C26—H26 | 119.6 |
C5—C4—C3 | 119.4 (3) | C27—C26—H26 | 119.6 |
C5—C4—H4 | 120.3 | C28—C27—C26 | 120.3 (3) |
C3—C4—H4 | 120.3 | C28—C27—H27 | 119.9 |
C4—C5—C6 | 122.0 (3) | C26—C27—H27 | 119.9 |
C4—C5—H5 | 119.0 | C27—C28—C29 | 119.7 (3) |
C6—C5—H5 | 119.0 | C27—C28—H28 | 120.2 |
C5—C6—C1 | 118.0 (3) | C29—C28—H28 | 120.2 |
C5—C6—C8 | 121.1 (3) | C28—C29—C30 | 120.2 (3) |
C1—C6—C8 | 120.8 (3) | C28—C29—H29 | 119.9 |
C2—C7—H7A | 109.5 | C30—C29—H29 | 119.9 |
C2—C7—H7B | 109.5 | C29—C30—C25 | 120.9 (3) |
H7A—C7—H7B | 109.5 | C29—C30—H30 | 119.6 |
C2—C7—H7C | 109.5 | C25—C30—H30 | 119.6 |
H7A—C7—H7C | 109.5 | O1—C31—C32 | 110.0 (4) |
H7B—C7—H7C | 109.5 | O1—C31—H31A | 109.7 |
C6—C8—H8A | 109.5 | C32—C31—H31A | 109.7 |
C6—C8—H8B | 109.5 | O1—C31—H31B | 109.7 |
H8A—C8—H8B | 109.5 | C32—C31—H31B | 109.7 |
C6—C8—H8C | 109.5 | H31A—C31—H31B | 108.2 |
H8A—C8—H8C | 109.5 | C31—C32—C33 | 105.6 (4) |
H8B—C8—H8C | 109.5 | C31—C32—H32A | 110.6 |
N1—C9—N2 | 125.7 (2) | C33—C32—H32A | 110.6 |
N1—C9—C10 | 118.0 (2) | C31—C32—H32B | 110.6 |
N2—C9—C10 | 116.3 (2) | C33—C32—H32B | 110.6 |
C15—C10—C11 | 118.1 (2) | H32A—C32—H32B | 108.8 |
C15—C10—C9 | 122.2 (2) | C32—C33—C34 | 105.0 (4) |
C11—C10—C9 | 119.7 (2) | C32—C33—H33A | 110.7 |
C10—C11—C12 | 120.9 (3) | C34—C33—H33A | 110.7 |
C10—C11—H11 | 119.5 | C32—C33—H33B | 110.7 |
C12—C11—H11 | 119.5 | C34—C33—H33B | 110.7 |
C13—C12—C11 | 120.0 (3) | H33A—C33—H33B | 108.8 |
C13—C12—H12 | 120.0 | O1—C34—C33 | 107.2 (3) |
C11—C12—H12 | 120.0 | O1—C34—H34A | 110.3 |
C12—C13—C14 | 120.0 (3) | C33—C34—H34A | 110.3 |
C12—C13—H13 | 120.0 | O1—C34—H34B | 110.3 |
C14—C13—H13 | 120.0 | C33—C34—H34B | 110.3 |
C13—C14—C15 | 119.9 (3) | H34A—C34—H34B | 108.5 |
C13—C14—H14 | 120.0 | O2—C35—C36 | 106.4 (3) |
C15—C14—H14 | 120.0 | O2—C35—H35A | 110.5 |
C10—C15—C14 | 121.1 (3) | C36—C35—H35A | 110.5 |
C10—C15—H15 | 119.5 | O2—C35—H35B | 110.5 |
C14—C15—H15 | 119.5 | C36—C35—H35B | 110.5 |
C17—C16—C21 | 120.2 (3) | H35A—C35—H35B | 108.6 |
C17—C16—N3 | 120.6 (3) | C37—C36—C35 | 104.9 (3) |
C21—C16—N3 | 118.8 (2) | C37—C36—H36A | 110.8 |
C16—C17—C18 | 118.7 (3) | C35—C36—H36A | 110.8 |
C16—C17—C22 | 119.7 (3) | C37—C36—H36B | 110.8 |
C18—C17—C22 | 121.6 (3) | C35—C36—H36B | 110.8 |
C19—C18—C17 | 121.4 (3) | H36A—C36—H36B | 108.9 |
C19—C18—H18 | 119.3 | C38—C37—C36 | 106.6 (4) |
C17—C18—H18 | 119.3 | C38—C37—H37A | 110.4 |
C18—C19—C20 | 120.0 (3) | C36—C37—H37A | 110.4 |
C18—C19—H19 | 120.0 | C38—C37—H37B | 110.4 |
C20—C19—H19 | 120.0 | C36—C37—H37B | 110.4 |
C19—C20—C21 | 121.0 (3) | H37A—C37—H37B | 108.6 |
C19—C20—H20 | 119.5 | O2—C38—C37 | 110.0 (4) |
C21—C20—H20 | 119.5 | O2—C38—H38A | 109.7 |
C20—C21—C16 | 118.8 (3) | C37—C38—H38A | 109.7 |
C20—C21—C23 | 120.8 (3) | O2—C38—H38B | 109.7 |
C16—C21—C23 | 120.4 (3) | C37—C38—H38B | 109.7 |
C17—C22—H22A | 109.5 | H38A—C38—H38B | 108.2 |
C17—C22—H22B | 109.5 | C31—O1—C34 | 108.2 (3) |
H22A—C22—H22B | 109.5 | C38—O2—C35 | 107.8 (3) |
C9—N1—C1—C6 | −86.3 (3) | N3—C16—C17—C22 | −9.8 (4) |
C9—N1—C1—C2 | 102.3 (3) | C16—C17—C18—C19 | −0.4 (4) |
C6—C1—C2—C3 | −1.9 (4) | C22—C17—C18—C19 | −179.4 (3) |
N1—C1—C2—C3 | 169.6 (2) | C17—C18—C19—C20 | 1.0 (5) |
C6—C1—C2—C7 | 179.1 (2) | C18—C19—C20—C21 | −0.1 (5) |
N1—C1—C2—C7 | −9.4 (4) | C19—C20—C21—C16 | −1.4 (4) |
C1—C2—C3—C4 | −0.4 (4) | C19—C20—C21—C23 | 179.4 (3) |
C7—C2—C3—C4 | 178.6 (3) | C17—C16—C21—C20 | 2.0 (4) |
C2—C3—C4—C5 | 2.1 (5) | N3—C16—C21—C20 | −170.5 (2) |
C3—C4—C5—C6 | −1.6 (5) | C17—C16—C21—C23 | −178.8 (3) |
C4—C5—C6—C1 | −0.6 (4) | N3—C16—C21—C23 | 8.7 (4) |
C4—C5—C6—C8 | −179.1 (3) | C16—N3—C24—N4 | −4.3 (4) |
C2—C1—C6—C5 | 2.4 (4) | C16—N3—C24—C25 | 175.7 (2) |
N1—C1—C6—C5 | −168.8 (2) | N3—C24—C25—C26 | 151.3 (2) |
C2—C1—C6—C8 | −179.1 (3) | N4—C24—C25—C26 | −28.6 (4) |
N1—C1—C6—C8 | 9.7 (4) | N3—C24—C25—C30 | −28.0 (3) |
C1—N1—C9—N2 | 4.0 (4) | N4—C24—C25—C30 | 152.1 (2) |
C1—N1—C9—C10 | −176.2 (2) | C30—C25—C26—C27 | 0.7 (4) |
N1—C9—C10—C15 | −153.2 (2) | C24—C25—C26—C27 | −178.6 (3) |
N2—C9—C10—C15 | 26.6 (3) | C25—C26—C27—C28 | −0.3 (5) |
N1—C9—C10—C11 | 25.7 (3) | C26—C27—C28—C29 | 0.2 (5) |
N2—C9—C10—C11 | −154.5 (2) | C27—C28—C29—C30 | −0.4 (5) |
C15—C10—C11—C12 | −0.2 (4) | C28—C29—C30—C25 | 0.8 (4) |
C9—C10—C11—C12 | −179.1 (3) | C26—C25—C30—C29 | −0.9 (4) |
C10—C11—C12—C13 | −0.3 (5) | C24—C25—C30—C29 | 178.4 (2) |
C11—C12—C13—C14 | 0.6 (5) | O1—C31—C32—C33 | −14.6 (6) |
C12—C13—C14—C15 | −0.3 (5) | C31—C32—C33—C34 | 3.1 (5) |
C11—C10—C15—C14 | 0.5 (4) | C32—C33—C34—O1 | 8.9 (5) |
C9—C10—C15—C14 | 179.4 (3) | O2—C35—C36—C37 | −8.4 (6) |
C13—C14—C15—C10 | −0.2 (5) | C35—C36—C37—C38 | −4.4 (6) |
C24—N3—C16—C17 | 93.1 (3) | C36—C37—C38—O2 | 16.2 (6) |
C24—N3—C16—C21 | −94.5 (3) | C32—C31—O1—C34 | 20.8 (6) |
C21—C16—C17—C18 | −1.1 (4) | C33—C34—O1—C31 | −18.2 (5) |
N3—C16—C17—C18 | 171.2 (2) | C37—C38—O2—C35 | −22.1 (5) |
C21—C16—C17—C22 | 177.9 (2) | C36—C35—O2—C38 | 18.3 (5) |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2B···N3 | 0.88 | 2.27 | 3.123 (3) | 165 |
N4—H4B···N1i | 0.88 | 2.22 | 3.061 (3) | 159 |
N2—H2A···O2 | 0.88 | 2.23 | 3.047 (3) | 155 |
N4—H4A···O1i | 0.88 | 2.35 | 3.160 (4) | 153 |
Symmetry code: (i) x+1, y, z. |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2B···N3 | 0.88 | 2.27 | 3.123 (3) | 165 |
N4—H4B···N1i | 0.88 | 2.22 | 3.061 (3) | 159 |
N2—H2A···O2 | 0.88 | 2.23 | 3.047 (3) | 155 |
N4—H4A···O1i | 0.88 | 2.35 | 3.160 (4) | 153 |
Symmetry code: (i) x+1, y, z. |
Acknowledgements
This work was supported by grants from the Natural Science Foundation of China (grant No. 20702029) and the Natural Science Foundation of Shanxi Province (grant No. 2008011024).
References
Bai, S. D., Liu, R. Q., Wang, T., Guan, F., Wu, Y. B., Chao, J. B., Tong, H. B. & Liu, D. S. (2013). Polyhedron, 65, 161–169. Web of Science CSD CrossRef CAS Google Scholar
Bakthavachalam, K., Rajagopal, A. & Dastagiri Reddy, N. (2014). Dalton Trans. 43, 14816–14823. Web of Science CSD CrossRef CAS PubMed Google Scholar
Bruker (2000). SMART and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Edelmann, F. T. (1994). Coord. Chem. Rev. 137, 403–481. CrossRef Web of Science Google Scholar
Liu, R.-Q., Bai, S.-D. & Wang, T. (2013). Acta Cryst. E69, o520. CSD CrossRef IUCr Journals Google Scholar
Qian, F., Liu, K. Y. & Ma, H. Y. (2010). Dalton Trans. 39, 8071–8083. Web of Science CSD CrossRef CAS PubMed Google Scholar
Sheldrick, G. M. (1996). SADABS. University of Göttingen, Germany. Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Zhang, L.-Z. & Tong, H.-B. (2008). Acta Cryst. E64, o1276. Web of Science CSD CrossRef IUCr Journals Google Scholar
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.
Amidinate anions of the general formula [RC(NR')2]- are the nitrogen analogs of the carboxylate anions. Their steric and electronic properties can be readily modified in a wide range through variation of the substituents on the carbon and nitrogen atoms. They have been widely employed as ligands in main group and transition metal coordination chemistry (Edelmann, 1994). Deprotonation of an amidine using a metal alkyl is a general synthetic method for preparing metal amidinato complexes, which could act as catalysts in ring-opening polymerization of lactones and lactides (Qian et al., 2010; Bakthavachalam et al., 2014). Herein we report the crystal structure of the title compound prepared by a one pot reaction with 2,6-dimethylaniline, LiBun, PhCN and H2O.
The asymmetric unit of the title compound contains two amidines and two tetrahydronfuran molecules. Amidine molecules denoted A and B in the asymmetric unit possess different orientations. In molecule A, the phenyl ring C10—C15 and dimethylphenyl ring C1—C6 are twisted from the mean plane of N1/C9/N2 by 26.14 (18)° and 79.50 (8)°. Two N atoms connect the central C atom in different lengths of 1.293 (2) Å and 1.346 (2) Å, respectively. In molecule B, the phenyl ring C25—C30 and dimethylphenyl ring C16—C21 are twisted from the mean plane of N3/C24/N4 by 28.21 (18)° and 86.33 (8)°. Two N atoms connect the central C atom in different lengths of 1.288 (2) Å and 1.354 (2) Å. In the crystal, the intermolecular N—H···N hydrogen bonds link the molecules to give a one-dimension chain extending along the a-axis direction. The tetrahydrofuran molecules interact with the amidine chain via N—H···O hydrogen bonds. The compound is closely similar to the benzamidine with an o-tolyl substituent on the N atom, namely N2-o-Tolylbenzamidine (Zhang et al., 2008), which has no tetrahydrofuran molecules attached.