organic compounds
(E)-5-(2-Chlorophenyl)-7-ethyl-2-oxo-2,3-dihydro-1H-thieno[2,3-e][1,4]diazepin-4-ium 2,4,6-trinitrophenolate
aNelson Mandela Metropolitan University, Summerstrand Campus, Department of Chemistry, University Way, Summerstrand, PO Box 77000, Port Elizabeth 6031, South Africa, bUniversity of Mysore, Department of Studies in Chemistry, Manasagangotri, Mysore 570 006, India, and cR. L. Fine Chem., Bangalore 560 064, India
*Correspondence e-mail: richard.betz@webmail.co.za
In the title molecular salt, C15H14ClN2OS+·C6H2N3O7−, protonation occurred on the double-bonded N atom. One of the nitro groups shows slight disorder over two orientations, with an occupancy ratio of 0.91:0.09. In the crystal, classical N—H⋯O hydrogen bonds, as well as C—H⋯O contacts connect the components into a three-dimensional network. The seven-membered ring adopts a boat-like conformation. The least-squares plane defined by its non-H atoms encloses an angle of 38.99 (6)° with the benzene ring bonded to it.
Related literature
For pharmaceutical background to benzodiazepines, see: Robol et al. (1996); Evans et al. (2001). For related structures, see: Scammells et al. (2001); Jasinski et al. (2010). For graph-set analysis of hydrogen bonds, see: Etter et al. (1990); Bernstein et al. (1995). For puckering analysis, see: Cremer & Pople (1975).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2010); cell SAINT (Bruker, 2010); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997) and Mercury (Macrae et al., 2008); software used to prepare material for publication: SHELXL97 and PLATON (Spek, 2009).
Supporting information
10.1107/S1600536812002607/pk2384sup1.cif
contains datablocks I, global. DOI:Supporting information file. DOI: 10.1107/S1600536812002607/pk2384Isup2.cdx
Structure factors: contains datablock I. DOI: 10.1107/S1600536812002607/pk2384Isup3.hkl
Supporting information file. DOI: 10.1107/S1600536812002607/pk2384Isup4.cml
(E)-5-(2-Chlorophenyl)-7-ethyl-1H-thieno[2,3-e] [1,4]diazepin-2(3H)-one was obtained as a gift sample from R. L. Fine Chem., Bengaluru, India. (E)-5-(2-Chlorophenyl)-7-ethyl-1H-thieno [2,3-e][1,4]diazepin-2(3H)-one (3.04 g, 0.01 mol) was dissolved in 10 ml of methanol and picric acid (2.29 g, 0.01 mol) was also dissolved in 10 ml of methanol. Both solutions were mixed and stirred in a beaker at 333 K for 30 minutes. The mixture was kept aside for a day at room temperature. The salt formed was filtered and dried in a vaccum desiccator over phosphorous pentoxide. The compound was recrystallized from a mixture (v:v = 1:1) of DMSO and ethanol by slow evaporation (m.p: 518 K).
Carbon-bound H atoms were placed in calculated positions (C—H 0.95 Å for aromatic carbon atoms, C—H 0.99 Å for methylene groups) and were included in the
in the riding model approximation, with U(H) set to 1.2Ueq(C). The H atoms of the methyl group were allowed to rotate with a fixed angle around the C—C bond (C—H 0.98 Å) to best fit the experimental electron density (HFIX 137 in the SHELX program suite (Sheldrick, 2008), with U(H) set to 1.5Ueq(C). Both nitrogen-bound H atoms were located on a difference Fourier map and refined freely.Data collection: APEX2 (Bruker, 2010); cell
SAINT (Bruker, 2010); data reduction: SAINT (Bruker, 2010); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997) and Mercury (Macrae et al., 2008); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009).Fig. 1. The molecular structure of the title compound, with anisotropic displacement ellipsoids (drawn at 50% probability level). For clarity, only the major component of the disordered nitro group is depicted. | |
Fig. 2. Intermolecular contacts, viewed approximately along [-1 -1 -1]. For clarity, only selected intermolecular contacts are depicted. Blue dashed lines show classical hydrogen bonds of the N–H···O type, green dashed lines C–H···O contacts. Symmetry operator: i -x + 1, -y, -z. Only the major component of the disordered nitro group is depicted. |
C15H14ClN2OS+·C6H2N3O7− | F(000) = 1096 |
Mr = 533.90 | Dx = 1.571 Mg m−3 |
Monoclinic, P21/c | Melting point: 518 K |
Hall symbol: -P 2ybc | Mo Kα radiation, λ = 0.71073 Å |
a = 10.5704 (2) Å | Cell parameters from 9909 reflections |
b = 20.0667 (5) Å | θ = 2.9–28.3° |
c = 11.3741 (2) Å | µ = 0.32 mm−1 |
β = 110.666 (1)° | T = 200 K |
V = 2257.35 (8) Å3 | Block, brown |
Z = 4 | 0.59 × 0.49 × 0.36 mm |
Bruker APEXII CCD diffractometer | 5607 independent reflections |
Radiation source: fine-focus sealed tube | 5073 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.013 |
ϕ and ω scans | θmax = 28.3°, θmin = 2.0° |
Absorption correction: multi-scan (SADABS; Bruker, 2008). | h = −13→14 |
Tmin = 0.807, Tmax = 0.892 | k = −26→26 |
21254 measured reflections | l = −15→15 |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.031 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.081 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.05 | w = 1/[σ2(Fo2) + (0.0349P)2 + 1.1718P] where P = (Fo2 + 2Fc2)/3 |
5607 reflections | (Δ/σ)max < 0.001 |
343 parameters | Δρmax = 0.38 e Å−3 |
0 restraints | Δρmin = −0.24 e Å−3 |
C15H14ClN2OS+·C6H2N3O7− | V = 2257.35 (8) Å3 |
Mr = 533.90 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 10.5704 (2) Å | µ = 0.32 mm−1 |
b = 20.0667 (5) Å | T = 200 K |
c = 11.3741 (2) Å | 0.59 × 0.49 × 0.36 mm |
β = 110.666 (1)° |
Bruker APEXII CCD diffractometer | 5607 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2008). | 5073 reflections with I > 2σ(I) |
Tmin = 0.807, Tmax = 0.892 | Rint = 0.013 |
21254 measured reflections |
R[F2 > 2σ(F2)] = 0.031 | 0 restraints |
wR(F2) = 0.081 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.05 | Δρmax = 0.38 e Å−3 |
5607 reflections | Δρmin = −0.24 e Å−3 |
343 parameters |
x | y | z | Uiso*/Ueq | Occ. (<1) | |
Cl1 | 0.57956 (3) | 0.230591 (16) | 0.27567 (3) | 0.03062 (8) | |
S1 | 0.08122 (3) | 0.038903 (15) | −0.15866 (3) | 0.02327 (8) | |
O1 | 0.53537 (10) | 0.04170 (5) | −0.16774 (10) | 0.0361 (2) | |
O31 | 0.75141 (9) | 0.09665 (4) | 0.21426 (8) | 0.02763 (19) | |
O321 | 0.75835 (10) | 0.21026 (6) | 0.09075 (9) | 0.0377 (2) | |
O322 | 0.96274 (13) | 0.23796 (7) | 0.11380 (11) | 0.0495 (3) | |
O341 | 1.27262 (12) | 0.24856 (6) | 0.54001 (12) | 0.0505 (3) | |
O342 | 1.25204 (13) | 0.17919 (7) | 0.67751 (12) | 0.0607 (4) | |
N36 | 0.84539 (12) | 0.04459 (6) | 0.46335 (11) | 0.0328 (3) | |
O361 | 0.8483 (2) | 0.04566 (12) | 0.57264 (12) | 0.0591 (7) | 0.913 (5) |
O362 | 0.79227 (19) | −0.00036 (7) | 0.39045 (12) | 0.0432 (5) | 0.913 (5) |
O363 | 0.8925 (12) | 0.0218 (6) | 0.5586 (12) | 0.023 (3)* | 0.087 (5) |
O364 | 0.7289 (16) | 0.0258 (8) | 0.3784 (12) | 0.037 (4)* | 0.087 (5) |
N1 | 0.49406 (10) | 0.12534 (5) | 0.07439 (9) | 0.01965 (19) | |
H71 | 0.5767 (19) | 0.1274 (9) | 0.1273 (17) | 0.040 (5)* | |
N2 | 0.34466 (10) | 0.03182 (5) | −0.12197 (9) | 0.0216 (2) | |
H72 | 0.3224 (17) | −0.0023 (9) | −0.1669 (16) | 0.033 (4)* | |
N32 | 0.87981 (11) | 0.21070 (6) | 0.15093 (10) | 0.0277 (2) | |
N34 | 1.21470 (12) | 0.20290 (6) | 0.57125 (12) | 0.0375 (3) | |
C1 | 0.45809 (12) | 0.06515 (6) | −0.12171 (11) | 0.0229 (2) | |
C2 | 0.47774 (12) | 0.13264 (6) | −0.05765 (11) | 0.0228 (2) | |
H2A | 0.5588 | 0.1545 | −0.0645 | 0.027* | |
H2B | 0.3985 | 0.1613 | −0.1002 | 0.027* | |
C3 | 0.39456 (11) | 0.11469 (5) | 0.11481 (10) | 0.0186 (2) | |
C4 | −0.11953 (12) | 0.08838 (7) | −0.07592 (13) | 0.0272 (3) | |
H4A | −0.1330 | 0.1015 | 0.0028 | 0.033* | |
H4B | −0.1627 | 0.0444 | −0.1017 | 0.033* | |
C5 | −0.18803 (14) | 0.13922 (8) | −0.17752 (15) | 0.0399 (3) | |
H5A | −0.1502 | 0.1835 | −0.1498 | 0.060* | |
H5B | −0.2854 | 0.1397 | −0.1933 | 0.060* | |
H5C | −0.1727 | 0.1273 | −0.2549 | 0.060* | |
C11 | 0.24806 (11) | 0.05778 (6) | −0.07911 (10) | 0.0194 (2) | |
C12 | 0.26416 (11) | 0.09611 (6) | 0.02726 (10) | 0.0198 (2) | |
C13 | 0.13619 (12) | 0.10916 (6) | 0.04104 (11) | 0.0230 (2) | |
H13 | 0.1277 | 0.1342 | 0.1088 | 0.028* | |
C14 | 0.02920 (12) | 0.08249 (6) | −0.05130 (11) | 0.0232 (2) | |
C21 | 0.42065 (11) | 0.11893 (6) | 0.25106 (11) | 0.0210 (2) | |
C22 | 0.50465 (12) | 0.16687 (6) | 0.33080 (11) | 0.0243 (2) | |
C23 | 0.52897 (15) | 0.16634 (8) | 0.45900 (13) | 0.0368 (3) | |
H23 | 0.5859 | 0.1992 | 0.5119 | 0.044* | |
C24 | 0.47029 (17) | 0.11802 (9) | 0.50923 (13) | 0.0428 (4) | |
H24 | 0.4878 | 0.1174 | 0.5971 | 0.051* | |
C25 | 0.38611 (16) | 0.07037 (8) | 0.43273 (14) | 0.0377 (3) | |
H25 | 0.3456 | 0.0373 | 0.4678 | 0.045* | |
C26 | 0.36134 (13) | 0.07120 (7) | 0.30489 (12) | 0.0283 (3) | |
H26 | 0.3028 | 0.0387 | 0.2526 | 0.034* | |
C31 | 0.85448 (11) | 0.12197 (6) | 0.29523 (11) | 0.0208 (2) | |
C32 | 0.92952 (12) | 0.17741 (6) | 0.27217 (11) | 0.0225 (2) | |
C33 | 1.04736 (12) | 0.20209 (6) | 0.35838 (12) | 0.0256 (2) | |
H33 | 1.0953 | 0.2371 | 0.3363 | 0.031* | |
C34 | 1.09452 (12) | 0.17498 (6) | 0.47757 (12) | 0.0267 (3) | |
C35 | 1.02603 (13) | 0.12448 (6) | 0.51186 (12) | 0.0280 (3) | |
H35 | 1.0569 | 0.1080 | 0.5955 | 0.034* | |
C36 | 0.91220 (12) | 0.09847 (6) | 0.42255 (11) | 0.0244 (2) |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cl1 | 0.03397 (16) | 0.02676 (15) | 0.03248 (16) | −0.01114 (12) | 0.01341 (13) | −0.00916 (11) |
S1 | 0.01661 (13) | 0.02786 (15) | 0.02118 (14) | −0.00278 (10) | 0.00153 (10) | −0.00509 (10) |
O1 | 0.0307 (5) | 0.0438 (6) | 0.0402 (5) | −0.0040 (4) | 0.0204 (4) | −0.0127 (4) |
O31 | 0.0212 (4) | 0.0225 (4) | 0.0289 (4) | −0.0008 (3) | −0.0038 (3) | −0.0028 (3) |
O321 | 0.0293 (5) | 0.0464 (6) | 0.0305 (5) | 0.0064 (4) | 0.0020 (4) | 0.0102 (4) |
O322 | 0.0465 (6) | 0.0593 (7) | 0.0426 (6) | −0.0143 (6) | 0.0155 (5) | 0.0147 (5) |
O341 | 0.0336 (6) | 0.0361 (6) | 0.0629 (8) | −0.0136 (5) | −0.0065 (5) | −0.0026 (5) |
O342 | 0.0493 (7) | 0.0693 (9) | 0.0367 (6) | −0.0165 (6) | −0.0183 (5) | 0.0039 (6) |
N36 | 0.0317 (6) | 0.0376 (6) | 0.0242 (5) | −0.0089 (5) | 0.0037 (4) | 0.0028 (5) |
O361 | 0.0699 (12) | 0.0805 (14) | 0.0235 (6) | −0.0390 (11) | 0.0124 (6) | −0.0028 (7) |
O362 | 0.0621 (11) | 0.0307 (7) | 0.0354 (6) | −0.0185 (7) | 0.0154 (6) | −0.0032 (5) |
N1 | 0.0162 (4) | 0.0225 (5) | 0.0180 (4) | −0.0010 (4) | 0.0032 (4) | −0.0027 (3) |
N2 | 0.0201 (5) | 0.0224 (5) | 0.0212 (5) | −0.0016 (4) | 0.0061 (4) | −0.0056 (4) |
N32 | 0.0303 (5) | 0.0265 (5) | 0.0250 (5) | 0.0003 (4) | 0.0082 (4) | 0.0009 (4) |
N34 | 0.0264 (6) | 0.0322 (6) | 0.0397 (7) | −0.0035 (5) | −0.0060 (5) | −0.0066 (5) |
C1 | 0.0205 (5) | 0.0290 (6) | 0.0179 (5) | −0.0004 (4) | 0.0052 (4) | −0.0012 (4) |
C2 | 0.0228 (5) | 0.0253 (5) | 0.0201 (5) | −0.0040 (4) | 0.0074 (4) | −0.0002 (4) |
C3 | 0.0166 (5) | 0.0174 (5) | 0.0194 (5) | 0.0000 (4) | 0.0035 (4) | −0.0028 (4) |
C4 | 0.0158 (5) | 0.0295 (6) | 0.0344 (6) | −0.0011 (4) | 0.0065 (5) | −0.0028 (5) |
C5 | 0.0244 (6) | 0.0466 (8) | 0.0456 (8) | 0.0098 (6) | 0.0083 (6) | 0.0099 (7) |
C11 | 0.0168 (5) | 0.0203 (5) | 0.0185 (5) | −0.0011 (4) | 0.0030 (4) | −0.0006 (4) |
C12 | 0.0163 (5) | 0.0213 (5) | 0.0199 (5) | −0.0009 (4) | 0.0041 (4) | −0.0025 (4) |
C13 | 0.0186 (5) | 0.0248 (5) | 0.0247 (5) | 0.0001 (4) | 0.0066 (4) | −0.0043 (4) |
C14 | 0.0177 (5) | 0.0242 (5) | 0.0263 (6) | 0.0001 (4) | 0.0059 (4) | −0.0011 (4) |
C21 | 0.0184 (5) | 0.0240 (5) | 0.0195 (5) | −0.0013 (4) | 0.0052 (4) | −0.0040 (4) |
C22 | 0.0218 (5) | 0.0271 (6) | 0.0237 (6) | −0.0050 (4) | 0.0077 (4) | −0.0051 (4) |
C23 | 0.0376 (7) | 0.0466 (8) | 0.0237 (6) | −0.0133 (6) | 0.0077 (5) | −0.0128 (6) |
C24 | 0.0486 (9) | 0.0593 (10) | 0.0206 (6) | −0.0123 (8) | 0.0125 (6) | −0.0044 (6) |
C25 | 0.0406 (8) | 0.0459 (8) | 0.0302 (7) | −0.0110 (6) | 0.0168 (6) | 0.0014 (6) |
C26 | 0.0278 (6) | 0.0305 (6) | 0.0267 (6) | −0.0073 (5) | 0.0099 (5) | −0.0036 (5) |
C31 | 0.0171 (5) | 0.0210 (5) | 0.0218 (5) | 0.0022 (4) | 0.0037 (4) | −0.0029 (4) |
C32 | 0.0212 (5) | 0.0226 (5) | 0.0215 (5) | 0.0022 (4) | 0.0049 (4) | −0.0002 (4) |
C33 | 0.0204 (5) | 0.0226 (5) | 0.0317 (6) | −0.0009 (4) | 0.0065 (5) | −0.0029 (5) |
C34 | 0.0185 (5) | 0.0257 (6) | 0.0283 (6) | −0.0011 (4) | −0.0014 (5) | −0.0056 (5) |
C35 | 0.0260 (6) | 0.0291 (6) | 0.0223 (5) | −0.0002 (5) | 0.0005 (5) | −0.0009 (5) |
C36 | 0.0227 (5) | 0.0246 (6) | 0.0231 (5) | −0.0023 (4) | 0.0044 (5) | −0.0004 (4) |
Cl1—C22 | 1.7337 (13) | C4—C5 | 1.5199 (19) |
S1—C11 | 1.7164 (11) | C4—H4A | 0.9900 |
S1—C14 | 1.7415 (12) | C4—H4B | 0.9900 |
O1—C1 | 1.2102 (15) | C5—H5A | 0.9800 |
O31—C31 | 1.2590 (14) | C5—H5B | 0.9800 |
O321—N32 | 1.2234 (15) | C5—H5C | 0.9800 |
O322—N32 | 1.2277 (15) | C11—C12 | 1.3925 (15) |
O341—N34 | 1.2222 (18) | C12—C13 | 1.4396 (15) |
O342—N34 | 1.2273 (18) | C13—C14 | 1.3528 (16) |
N36—O363 | 1.118 (12) | C13—H13 | 0.9500 |
N36—O362 | 1.2196 (16) | C21—C26 | 1.3985 (17) |
N36—O361 | 1.2330 (19) | C21—C22 | 1.4029 (16) |
N36—O364 | 1.323 (14) | C22—C23 | 1.3885 (18) |
N36—C36 | 1.4542 (16) | C23—C24 | 1.379 (2) |
N1—C3 | 1.3056 (15) | C23—H23 | 0.9500 |
N1—C2 | 1.4574 (15) | C24—C25 | 1.384 (2) |
N1—H71 | 0.870 (19) | C24—H24 | 0.9500 |
N2—C1 | 1.3720 (15) | C25—C26 | 1.3836 (18) |
N2—C11 | 1.3795 (15) | C25—H25 | 0.9500 |
N2—H72 | 0.836 (18) | C26—H26 | 0.9500 |
N32—C32 | 1.4534 (15) | C31—C36 | 1.4380 (16) |
N34—C34 | 1.4519 (15) | C31—C32 | 1.4431 (16) |
C1—C2 | 1.5170 (17) | C32—C33 | 1.3771 (16) |
C2—H2A | 0.9900 | C33—C34 | 1.3803 (18) |
C2—H2B | 0.9900 | C33—H33 | 0.9500 |
C3—C12 | 1.4358 (15) | C34—C35 | 1.3793 (18) |
C3—C21 | 1.4776 (15) | C35—C36 | 1.3745 (17) |
C4—C14 | 1.5011 (16) | C35—H35 | 0.9500 |
C11—S1—C14 | 92.26 (5) | C12—C11—S1 | 111.57 (8) |
O363—N36—O362 | 107.3 (6) | C11—C12—C3 | 122.62 (10) |
O362—N36—O361 | 122.68 (13) | C11—C12—C13 | 111.32 (10) |
O363—N36—O364 | 124.9 (9) | C3—C12—C13 | 125.89 (10) |
O361—N36—O364 | 115.2 (6) | C14—C13—C12 | 113.81 (10) |
O363—N36—C36 | 120.9 (6) | C14—C13—H13 | 123.1 |
O362—N36—C36 | 119.46 (11) | C12—C13—H13 | 123.1 |
O361—N36—C36 | 117.83 (12) | C13—C14—C4 | 130.33 (11) |
O364—N36—C36 | 114.2 (6) | C13—C14—S1 | 111.02 (9) |
C3—N1—C2 | 124.21 (10) | C4—C14—S1 | 118.55 (9) |
C3—N1—H71 | 120.1 (12) | C26—C21—C22 | 117.76 (11) |
C2—N1—H71 | 115.7 (12) | C26—C21—C3 | 118.24 (10) |
C1—N2—C11 | 124.78 (10) | C22—C21—C3 | 123.97 (11) |
C1—N2—H72 | 117.2 (11) | C23—C22—C21 | 120.93 (12) |
C11—N2—H72 | 116.2 (11) | C23—C22—Cl1 | 116.52 (10) |
O321—N32—O322 | 123.13 (12) | C21—C22—Cl1 | 122.52 (9) |
O321—N32—C32 | 118.95 (11) | C24—C23—C22 | 119.79 (13) |
O322—N32—C32 | 117.92 (11) | C24—C23—H23 | 120.1 |
O341—N34—O342 | 123.85 (12) | C22—C23—H23 | 120.1 |
O341—N34—C34 | 118.31 (12) | C23—C24—C25 | 120.57 (13) |
O342—N34—C34 | 117.84 (13) | C23—C24—H24 | 119.7 |
O1—C1—N2 | 122.16 (12) | C25—C24—H24 | 119.7 |
O1—C1—C2 | 123.78 (11) | C26—C25—C24 | 119.56 (13) |
N2—C1—C2 | 114.05 (10) | C26—C25—H25 | 120.2 |
N1—C2—C1 | 110.59 (10) | C24—C25—H25 | 120.2 |
N1—C2—H2A | 109.5 | C25—C26—C21 | 121.37 (12) |
C1—C2—H2A | 109.5 | C25—C26—H26 | 119.3 |
N1—C2—H2B | 109.5 | C21—C26—H26 | 119.3 |
C1—C2—H2B | 109.5 | O31—C31—C36 | 123.67 (11) |
H2A—C2—H2B | 108.1 | O31—C31—C32 | 124.57 (11) |
N1—C3—C12 | 119.59 (10) | C36—C31—C32 | 111.76 (10) |
N1—C3—C21 | 118.98 (10) | C33—C32—C31 | 124.39 (11) |
C12—C3—C21 | 121.36 (10) | C33—C32—N32 | 116.33 (11) |
C14—C4—C5 | 112.41 (11) | C31—C32—N32 | 119.27 (10) |
C14—C4—H4A | 109.1 | C32—C33—C34 | 118.69 (12) |
C5—C4—H4A | 109.1 | C32—C33—H33 | 120.7 |
C14—C4—H4B | 109.1 | C34—C33—H33 | 120.7 |
C5—C4—H4B | 109.1 | C35—C34—C33 | 121.57 (11) |
H4A—C4—H4B | 107.9 | C35—C34—N34 | 119.12 (12) |
C4—C5—H5A | 109.5 | C33—C34—N34 | 119.21 (12) |
C4—C5—H5B | 109.5 | C36—C35—C34 | 118.68 (12) |
H5A—C5—H5B | 109.5 | C36—C35—H35 | 120.7 |
C4—C5—H5C | 109.5 | C34—C35—H35 | 120.7 |
H5A—C5—H5C | 109.5 | C35—C36—C31 | 124.71 (11) |
H5B—C5—H5C | 109.5 | C35—C36—N36 | 116.33 (11) |
N2—C11—C12 | 129.56 (10) | C31—C36—N36 | 118.94 (10) |
N2—C11—S1 | 118.77 (8) | ||
C11—N2—C1—O1 | −175.18 (12) | C22—C23—C24—C25 | −0.7 (3) |
C11—N2—C1—C2 | 5.61 (16) | C23—C24—C25—C26 | 0.3 (3) |
C3—N1—C2—C1 | −77.66 (14) | C24—C25—C26—C21 | 0.6 (2) |
O1—C1—C2—N1 | −117.45 (13) | C22—C21—C26—C25 | −1.1 (2) |
N2—C1—C2—N1 | 61.75 (13) | C3—C21—C26—C25 | 177.14 (13) |
C2—N1—C3—C12 | 12.62 (17) | O31—C31—C32—C33 | −175.40 (12) |
C2—N1—C3—C21 | −170.29 (10) | C36—C31—C32—C33 | 4.22 (17) |
C1—N2—C11—C12 | −41.65 (19) | O31—C31—C32—N32 | 4.86 (18) |
C1—N2—C11—S1 | 142.17 (10) | C36—C31—C32—N32 | −175.52 (10) |
C14—S1—C11—N2 | 177.15 (10) | O321—N32—C32—C33 | −152.12 (12) |
C14—S1—C11—C12 | 0.32 (9) | O322—N32—C32—C33 | 28.00 (17) |
N2—C11—C12—C3 | −0.8 (2) | O321—N32—C32—C31 | 27.64 (17) |
S1—C11—C12—C3 | 175.59 (9) | O322—N32—C32—C31 | −152.24 (12) |
N2—C11—C12—C13 | −176.29 (12) | C31—C32—C33—C34 | −3.70 (19) |
S1—C11—C12—C13 | 0.10 (13) | N32—C32—C33—C34 | 176.05 (11) |
N1—C3—C12—C11 | 32.88 (17) | C32—C33—C34—C35 | −0.45 (19) |
C21—C3—C12—C11 | −144.13 (12) | C32—C33—C34—N34 | −176.78 (12) |
N1—C3—C12—C13 | −152.30 (12) | O341—N34—C34—C35 | −178.51 (13) |
C21—C3—C12—C13 | 30.68 (18) | O342—N34—C34—C35 | 1.4 (2) |
C11—C12—C13—C14 | −0.65 (15) | O341—N34—C34—C33 | −2.1 (2) |
C3—C12—C13—C14 | −175.96 (11) | O342—N34—C34—C33 | 177.82 (14) |
C12—C13—C14—C4 | −175.42 (12) | C33—C34—C35—C36 | 3.5 (2) |
C12—C13—C14—S1 | 0.88 (14) | N34—C34—C35—C36 | 179.86 (12) |
C5—C4—C14—C13 | 99.93 (17) | C34—C35—C36—C31 | −2.8 (2) |
C5—C4—C14—S1 | −76.14 (14) | C34—C35—C36—N36 | 178.98 (12) |
C11—S1—C14—C13 | −0.69 (10) | O31—C31—C36—C35 | 178.71 (12) |
C11—S1—C14—C4 | 176.10 (10) | C32—C31—C36—C35 | −0.92 (17) |
N1—C3—C21—C26 | −138.62 (12) | O31—C31—C36—N36 | −3.08 (18) |
C12—C3—C21—C26 | 38.41 (16) | C32—C31—C36—N36 | 177.29 (11) |
N1—C3—C21—C22 | 39.47 (17) | O363—N36—C36—C35 | −7.5 (9) |
C12—C3—C21—C22 | −143.50 (12) | O362—N36—C36—C35 | −144.83 (16) |
C26—C21—C22—C23 | 0.68 (19) | O361—N36—C36—C35 | 33.3 (2) |
C3—C21—C22—C23 | −177.42 (12) | O364—N36—C36—C35 | 173.3 (8) |
C26—C21—C22—Cl1 | −177.61 (10) | O363—N36—C36—C31 | 174.1 (8) |
C3—C21—C22—Cl1 | 4.29 (17) | O362—N36—C36—C31 | 36.8 (2) |
C21—C22—C23—C24 | 0.2 (2) | O361—N36—C36—C31 | −145.06 (19) |
Cl1—C22—C23—C24 | 178.56 (13) | O364—N36—C36—C31 | −5.1 (9) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H71···O31 | 0.870 (19) | 1.865 (19) | 2.6847 (13) | 156.3 (17) |
N2—H72···O31i | 0.836 (18) | 2.047 (18) | 2.8331 (13) | 156.4 (16) |
N2—H72···O362i | 0.836 (18) | 2.400 (17) | 2.9495 (16) | 123.9 (14) |
C2—H2A···O321 | 0.99 | 2.49 | 3.2465 (16) | 133 |
C2—H2B···O342ii | 0.99 | 2.48 | 3.2505 (17) | 134 |
C23—H23···O321iii | 0.95 | 2.51 | 3.4193 (18) | 161 |
Symmetry codes: (i) −x+1, −y, −z; (ii) x−1, y, z−1; (iii) x, −y+1/2, z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C15H14ClN2OS+·C6H2N3O7− |
Mr | 533.90 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 200 |
a, b, c (Å) | 10.5704 (2), 20.0667 (5), 11.3741 (2) |
β (°) | 110.666 (1) |
V (Å3) | 2257.35 (8) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.32 |
Crystal size (mm) | 0.59 × 0.49 × 0.36 |
Data collection | |
Diffractometer | Bruker APEXII CCD diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2008). |
Tmin, Tmax | 0.807, 0.892 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 21254, 5607, 5073 |
Rint | 0.013 |
(sin θ/λ)max (Å−1) | 0.668 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.031, 0.081, 1.05 |
No. of reflections | 5607 |
No. of parameters | 343 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.38, −0.24 |
Computer programs: APEX2 (Bruker, 2010), SAINT (Bruker, 2010), SHELXS97 (Sheldrick, 2008), ORTEP-3 for Windows (Farrugia, 1997) and Mercury (Macrae et al., 2008), SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H71···O31 | 0.870 (19) | 1.865 (19) | 2.6847 (13) | 156.3 (17) |
N2—H72···O31i | 0.836 (18) | 2.047 (18) | 2.8331 (13) | 156.4 (16) |
N2—H72···O362i | 0.836 (18) | 2.400 (17) | 2.9495 (16) | 123.9 (14) |
C2—H2A···O321 | 0.99 | 2.49 | 3.2465 (16) | 133.2 |
C2—H2B···O342ii | 0.99 | 2.48 | 3.2505 (17) | 134.3 |
C23—H23···O321iii | 0.95 | 2.51 | 3.4193 (18) | 161.4 |
Symmetry codes: (i) −x+1, −y, −z; (ii) x−1, y, z−1; (iii) x, −y+1/2, z+1/2. |
Acknowledgements
ASD thanks the University of Mysore for research facilities. HSY thanks R. L. Fine Chem., Bengaluru, for the gift sample.
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.
Five-atom heterocyclic fused benzodiazepine ring systems occupy a prominent place among drugs for treatment of central nervous system (CNS) disorders (Robol et al., 1996; Evans et al., 2001). The crystal structures of 6,7-dimethyl-5-phenyl-1H-thieno[2,3-e][1,4]diazepin-2(3H) -one (Scammells et al., 2001) and 5,7-dimethyl-2,3-dihydro-1H-1,4- diazepin-4-ium picrate (Jasinski et al., 2010) have been reported. In view of the importance of heterocyclic fused diazepine ring systems, the paper reports the crystal structure of the title compound.
The title compound is the picrate salt of (E)-5-(2-chlorophenyl)-7- ethyl-1H-thieno[2,3-e][1,4]diazepin-2(3H)-one. Due to involvement of the free electron pair on the – formally – sp3 hybridized nitrogen atom in amide-type resonance, protonation occurred on the double-bonded nitrogen atom. According to a puckering analysis (Cremer & Pople, 1975), the seven-membered heterocycle adopts a boat-like conformation (Q2: 0.7754 (12) Å, Q3: 0.2281 (12) Å, ϕ2: 262.69 (9)°, ϕ3: 207.4 (3)°) (Fig. 1).
In the crystal structure, classical hydrogen bonds of the N–H···O type as well as C–H···O contacts whose range falls by more than 0.2 Å below the sum of van-der-Waals radii of the corresponding atoms are apparent. While the classical hydrogen bonds are supported by both nitrogen-bound H atoms and have the phenolic as well as nitrogen-bound oxygen atoms as acceptor, the C–H···O contacts exclusively apply the latter type of oxygen atoms as acceptors. The C–H···O contacts stem from both hydrogen atoms of the intracyclic methylene group as well as the hydrogen atom in ortho position to the chlorine atom. In terms of graph-set analysis (Etter et al., 1990; Bernstein et al., 1995), the descriptor for the classical hydrogen bonds is DDD on the unitary level (due to bifurcation of one of the classical hydrogen bonds). The same descriptor is necessary to describe the C–H···O contacts on the identical level. Metrical information about the contacts is summarized in Table 1. In total, the entities of the title compound are connected to a three-dimensional network. The shortest intercentroid distance between two aromatic systems was measured at 4.8063 (7) Å and is apparent between the thiophene moieties of two neighbouring molecules. (Fig. 2).