organic compounds
(E)-2-(2,3-Dimethylanilino)-N′-(thiophen-2-ylmethylidene)benzohydrazide
aX-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia, and bDepartment of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, PO Box 2457, Riyadh 11451, Saudi Arabia
*Correspondence e-mail: hkfun@usm.my
In the title compound, C20H19N3OS, the central benzene ring makes dihedral angles of 45.36 (9) and 55.33 (9)° with the thiophene ring and the dimethyl-substituted benzene ring, respectively. The dihedral angle between the thiophene ring and dimethyl-substituted benzene ring is 83.60 (9)°. The thiophene ring and the benzene ring are twisted from the mean plane of the C(=O)—N—N=C bridge [maximum deviation = 0.0860 (13) Å], with dihedral angles of 23.86 (9) and 24.77 (8)°, respectively. An intramolecular N—H⋯O hydrogen bond generates an S(6) ring. In the crystal, molecules are linked by N—H⋯O and C—H⋯O hydrogen bonds to the same acceptor atom, forming sheets lying parallel to the bc plane. The crystal packing also features C—H⋯π interactions.
Related literature
For background to the chemistry and biological activity of diaryl et al. (2010). For related structures, see: Bhat et al. (2012a,b,c); Wang et al. (2010); Tian et al. (2010). For hydrogen-bond motifs, see: Bernstein et al. (1995). For reference bond-length data, see: Allen et al. (1987). For the stability of the temperature controller used for the data collection, see: Cosier & Glazer (1986).
see: ReddyExperimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2009); cell SAINT (Bruker, 2009); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL and PLATON (Spek, 2009).
Supporting information
https://doi.org/10.1107/S160053681203259X/hb6898sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S160053681203259X/hb6898Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S160053681203259X/hb6898Isup3.cml
The title compound was prepared by the reaction of thiophene-2-carbaldehyde (0.11 g, 1 mmol) and 2-[(2,3-dimethylphenylamine)]benzohydrazide (0.25 g, 1 mmol) in ethanol (25 ml). After stirring at room temperature for 3 h, the resulting mixture was concentrated under reduced pressure. The precipitate was washed with cold ethanol to afford the title compound. Yellow needles were recrystallized from ethanol solution by the slow evaporation of the solvent at room temperature after several days.
The N-bound H atoms were located in a difference Fourier map and refined freely [N—H = 0.85 (3) and 0.89 (2) Å]. The remaining H atoms were positioned geometrically [C—H = 0.95 and 0.98 Å] and refined using a riding model with Uiso(H) = 1.2 or 1.5Ueq(C). A rotating group model was applied to the methyl groups. Two outliers, (302) and (312), were omitted in the final refinement.
In view of the importance of the chemistry and biological activity of diaryl
(Reddy et al., 2010) and in continuation to our interest in the chemistry of (Bhat et al., 2012a,b,c), we report herein the of the title compound.The ═O1)—N2—N3═C14 bridge [maximum deviation = 0.0860 (13) Å at atom N3] with dihedral angles of 23.86 (9)° and 24.77 (8)°, respectively. An intramolecular N1—H1N1···O1 hydrogen bond generates an S(6) ring motif (Bernstein et al., 1995) in the molecule. Bond lengths (Allen et al., 1987) and angles are within normal ranges and are comparable to those found in related structures (Tian et al., 2010; Wang et al., 2010).
of the title compound is shown in Fig. 1. The central benzene ring [C7–C12] makes dihedral angles of 45.36 (9)° and 55.33 (9)° with the thiophene ring [S1/C15–C18] and dimethyl-substituted benzene ring [C1–C6], respectively. The dihedral angle between the thiophene ring and C1–C6 benzene ring is 83.60 (9)°. The thiophene ring and C7–C12 benzene ring are twisted from the mean plane of C13(In the crystal (Fig. 2), molecules are linked by N2—H1N2···O1 and C1—H1A···O1 hydrogen bonds, with the same O atom acting as the acceptor, into sheets parallel to bc plane. The crystal packing also features C—H···π interactions (Table 1), involving Cg1 and Cg2 which are the centroids of S1/C15–C18 and C1–C6 rings, respectively.
For background to the chemistry and biological activity of diaryl
see: Reddy et al. (2010). For related structures, see: Bhat et al. (2012a,b,c); Wang et al. (2010); Tian et al. (2010). For hydrogen-bond motifs, see: Bernstein et al. (1995). For reference bond-length data, see: Allen et al. (1987). For the stability of the temperature controller used for the data collection, see: Cosier & Glazer (1986).Data collection: APEX2 (Bruker, 2009); cell
SAINT (Bruker, 2009); data reduction: SAINT (Bruker, 2009); program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).Fig. 1. The molecular structure of the title compound with 50% probability displacement ellipsoids. The dashed line represents the intramolecular N—H···O hydrogen bond. | |
Fig. 2. The crystal packing of the title compound. The dashed lines represent the hydrogen bonds. For clarity sake, hydrogen atoms not involved in hydrogen bonding have been omitted. |
C20H19N3OS | F(000) = 736 |
Mr = 349.44 | Dx = 1.315 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 1664 reflections |
a = 14.0922 (14) Å | θ = 2.9–24.3° |
b = 15.9682 (15) Å | µ = 0.20 mm−1 |
c = 8.1338 (8) Å | T = 100 K |
β = 105.344 (2)° | Needle, yellow |
V = 1765.1 (3) Å3 | 0.34 × 0.07 × 0.04 mm |
Z = 4 |
Bruker APEX DUO CCD diffractometer | 5082 independent reflections |
Radiation source: fine-focus sealed tube | 3338 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.067 |
φ and ω scans | θmax = 30.0°, θmin = 1.5° |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | h = −18→19 |
Tmin = 0.936, Tmax = 0.992 | k = −18→22 |
14626 measured reflections | l = −11→11 |
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)] = 0.051 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.128 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.01 | w = 1/[σ2(Fo2) + (0.0527P)2] where P = (Fo2 + 2Fc2)/3 |
5082 reflections | (Δ/σ)max < 0.001 |
236 parameters | Δρmax = 0.37 e Å−3 |
0 restraints | Δρmin = −0.35 e Å−3 |
C20H19N3OS | V = 1765.1 (3) Å3 |
Mr = 349.44 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 14.0922 (14) Å | µ = 0.20 mm−1 |
b = 15.9682 (15) Å | T = 100 K |
c = 8.1338 (8) Å | 0.34 × 0.07 × 0.04 mm |
β = 105.344 (2)° |
Bruker APEX DUO CCD diffractometer | 5082 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | 3338 reflections with I > 2σ(I) |
Tmin = 0.936, Tmax = 0.992 | Rint = 0.067 |
14626 measured reflections |
R[F2 > 2σ(F2)] = 0.051 | 0 restraints |
wR(F2) = 0.128 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.01 | Δρmax = 0.37 e Å−3 |
5082 reflections | Δρmin = −0.35 e Å−3 |
236 parameters |
Experimental. The crystal was placed in the cold stream of an Oxford Cryosystems Cobra open-flow nitrogen cryostat (Cosier & Glazer, 1986) operating at 100.0 (1) K. |
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 | ||
S1 | 0.10235 (4) | 0.29345 (3) | 0.79119 (6) | 0.02004 (13) | |
O1 | 0.44269 (10) | 0.16844 (8) | 0.95045 (15) | 0.0164 (3) | |
N1 | 0.63024 (13) | 0.11358 (11) | 1.0630 (2) | 0.0221 (4) | |
N2 | 0.38625 (12) | 0.23505 (10) | 1.1518 (2) | 0.0152 (3) | |
N3 | 0.30320 (11) | 0.26223 (9) | 1.03158 (19) | 0.0152 (3) | |
C1 | 0.72104 (15) | −0.01298 (12) | 1.0366 (2) | 0.0219 (4) | |
H1A | 0.6781 | −0.0443 | 1.0854 | 0.026* | |
C2 | 0.79626 (16) | −0.05289 (12) | 0.9882 (3) | 0.0225 (4) | |
H2A | 0.8060 | −0.1114 | 1.0056 | 0.027* | |
C3 | 0.85748 (15) | −0.00697 (12) | 0.9138 (2) | 0.0209 (4) | |
H3A | 0.9097 | −0.0344 | 0.8817 | 0.025* | |
C4 | 0.84361 (14) | 0.07824 (12) | 0.8855 (2) | 0.0173 (4) | |
C5 | 0.76785 (14) | 0.12003 (11) | 0.9365 (2) | 0.0164 (4) | |
C6 | 0.70796 (14) | 0.07299 (12) | 1.0141 (2) | 0.0171 (4) | |
C7 | 0.60869 (14) | 0.10490 (11) | 1.2183 (2) | 0.0170 (4) | |
C8 | 0.67460 (15) | 0.06586 (12) | 1.3575 (2) | 0.0203 (4) | |
H8A | 0.7349 | 0.0443 | 1.3442 | 0.024* | |
C9 | 0.65339 (16) | 0.05829 (12) | 1.5130 (3) | 0.0239 (4) | |
H9A | 0.6989 | 0.0310 | 1.6044 | 0.029* | |
C10 | 0.56674 (16) | 0.08987 (12) | 1.5376 (2) | 0.0233 (4) | |
H10A | 0.5523 | 0.0841 | 1.6447 | 0.028* | |
C11 | 0.50153 (15) | 0.13000 (11) | 1.4038 (2) | 0.0188 (4) | |
H11A | 0.4420 | 0.1519 | 1.4203 | 0.023* | |
C12 | 0.52102 (14) | 0.13927 (11) | 1.2440 (2) | 0.0150 (4) | |
C13 | 0.44837 (13) | 0.18131 (11) | 1.1041 (2) | 0.0142 (4) | |
C14 | 0.25109 (14) | 0.31569 (11) | 1.0879 (2) | 0.0163 (4) | |
H14A | 0.2759 | 0.3391 | 1.1983 | 0.020* | |
C15 | 0.15535 (14) | 0.34032 (11) | 0.9847 (2) | 0.0156 (4) | |
C16 | 0.09047 (15) | 0.39305 (12) | 1.0313 (3) | 0.0207 (4) | |
H16A | 0.1061 | 0.4246 | 1.1340 | 0.025* | |
C17 | −0.00236 (15) | 0.39559 (13) | 0.9101 (3) | 0.0234 (4) | |
H17A | −0.0560 | 0.4289 | 0.9222 | 0.028* | |
C18 | −0.00604 (15) | 0.34505 (12) | 0.7747 (3) | 0.0227 (4) | |
H18A | −0.0625 | 0.3390 | 0.6811 | 0.027* | |
C19 | 0.90953 (17) | 0.12491 (14) | 0.7978 (3) | 0.0294 (5) | |
H19A | 0.9586 | 0.0863 | 0.7748 | 0.044* | |
H19B | 0.9430 | 0.1704 | 0.8716 | 0.044* | |
H19C | 0.8698 | 0.1483 | 0.6901 | 0.044* | |
C20 | 0.75020 (17) | 0.21221 (12) | 0.9033 (3) | 0.0241 (4) | |
H20A | 0.7177 | 0.2355 | 0.9857 | 0.036* | |
H20B | 0.7081 | 0.2205 | 0.7875 | 0.036* | |
H20C | 0.8133 | 0.2407 | 0.9149 | 0.036* | |
H1N2 | 0.3987 (16) | 0.2551 (13) | 1.257 (3) | 0.024 (6)* | |
H1N1 | 0.5850 (19) | 0.1361 (15) | 0.985 (3) | 0.035 (7)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0187 (3) | 0.0212 (2) | 0.0189 (2) | 0.0013 (2) | 0.00243 (18) | −0.00158 (19) |
O1 | 0.0181 (7) | 0.0193 (6) | 0.0122 (6) | 0.0016 (5) | 0.0045 (5) | −0.0001 (5) |
N1 | 0.0172 (9) | 0.0300 (9) | 0.0203 (9) | 0.0093 (7) | 0.0073 (7) | 0.0073 (7) |
N2 | 0.0136 (8) | 0.0194 (8) | 0.0116 (7) | 0.0030 (6) | 0.0013 (6) | −0.0016 (6) |
N3 | 0.0127 (8) | 0.0180 (7) | 0.0134 (7) | 0.0012 (6) | 0.0008 (6) | 0.0013 (6) |
C1 | 0.0206 (10) | 0.0214 (10) | 0.0231 (10) | −0.0019 (8) | 0.0047 (8) | 0.0026 (8) |
C2 | 0.0260 (11) | 0.0164 (9) | 0.0239 (10) | 0.0038 (8) | 0.0046 (9) | 0.0002 (8) |
C3 | 0.0191 (10) | 0.0230 (10) | 0.0201 (10) | 0.0064 (8) | 0.0044 (8) | −0.0023 (8) |
C4 | 0.0163 (10) | 0.0212 (9) | 0.0141 (9) | −0.0002 (7) | 0.0036 (7) | −0.0004 (7) |
C5 | 0.0172 (10) | 0.0169 (9) | 0.0128 (9) | 0.0003 (7) | −0.0001 (7) | −0.0004 (7) |
C6 | 0.0136 (9) | 0.0208 (9) | 0.0163 (9) | 0.0013 (7) | 0.0029 (7) | −0.0004 (7) |
C7 | 0.0164 (9) | 0.0165 (9) | 0.0174 (9) | 0.0001 (7) | 0.0036 (7) | −0.0006 (7) |
C8 | 0.0159 (10) | 0.0215 (9) | 0.0203 (10) | 0.0031 (8) | −0.0012 (8) | 0.0011 (8) |
C9 | 0.0267 (11) | 0.0222 (10) | 0.0171 (10) | 0.0029 (9) | −0.0042 (8) | 0.0003 (8) |
C10 | 0.0319 (12) | 0.0239 (10) | 0.0126 (9) | 0.0030 (9) | 0.0030 (8) | 0.0005 (8) |
C11 | 0.0201 (10) | 0.0188 (9) | 0.0174 (9) | 0.0025 (8) | 0.0050 (8) | −0.0007 (7) |
C12 | 0.0142 (9) | 0.0157 (8) | 0.0143 (9) | −0.0016 (7) | 0.0025 (7) | −0.0005 (7) |
C13 | 0.0127 (9) | 0.0142 (8) | 0.0160 (9) | −0.0022 (7) | 0.0042 (7) | −0.0002 (7) |
C14 | 0.0171 (10) | 0.0170 (9) | 0.0141 (9) | −0.0004 (7) | 0.0029 (7) | −0.0003 (7) |
C15 | 0.0151 (9) | 0.0169 (9) | 0.0155 (9) | 0.0003 (7) | 0.0053 (7) | 0.0029 (7) |
C16 | 0.0209 (10) | 0.0226 (10) | 0.0195 (10) | 0.0042 (8) | 0.0068 (8) | −0.0013 (8) |
C17 | 0.0177 (10) | 0.0257 (10) | 0.0280 (11) | 0.0076 (8) | 0.0083 (8) | 0.0073 (9) |
C18 | 0.0151 (10) | 0.0250 (10) | 0.0253 (11) | −0.0001 (8) | 0.0009 (8) | 0.0060 (8) |
C19 | 0.0262 (12) | 0.0360 (12) | 0.0306 (12) | 0.0019 (10) | 0.0156 (10) | 0.0064 (9) |
C20 | 0.0335 (12) | 0.0182 (9) | 0.0225 (10) | 0.0016 (9) | 0.0107 (9) | 0.0003 (8) |
S1—C18 | 1.709 (2) | C8—C9 | 1.380 (3) |
S1—C15 | 1.7243 (19) | C8—H8A | 0.9500 |
O1—C13 | 1.248 (2) | C9—C10 | 1.384 (3) |
N1—C7 | 1.382 (2) | C9—H9A | 0.9500 |
N1—C6 | 1.417 (2) | C10—C11 | 1.382 (3) |
N1—H1N1 | 0.85 (3) | C10—H10A | 0.9500 |
N2—C13 | 1.354 (2) | C11—C12 | 1.406 (3) |
N2—N3 | 1.382 (2) | C11—H11A | 0.9500 |
N2—H1N2 | 0.89 (2) | C12—C13 | 1.475 (3) |
N3—C14 | 1.287 (2) | C14—C15 | 1.442 (3) |
C1—C2 | 1.381 (3) | C14—H14A | 0.9500 |
C1—C6 | 1.391 (3) | C15—C16 | 1.368 (3) |
C1—H1A | 0.9500 | C16—C17 | 1.415 (3) |
C2—C3 | 1.387 (3) | C16—H16A | 0.9500 |
C2—H2A | 0.9500 | C17—C18 | 1.355 (3) |
C3—C4 | 1.385 (3) | C17—H17A | 0.9500 |
C3—H3A | 0.9500 | C18—H18A | 0.9500 |
C4—C5 | 1.411 (3) | C19—H19A | 0.9800 |
C4—C19 | 1.510 (3) | C19—H19B | 0.9800 |
C5—C6 | 1.399 (3) | C19—H19C | 0.9800 |
C5—C20 | 1.505 (3) | C20—H20A | 0.9800 |
C7—C8 | 1.406 (3) | C20—H20B | 0.9800 |
C7—C12 | 1.417 (3) | C20—H20C | 0.9800 |
C18—S1—C15 | 91.42 (10) | C9—C10—H10A | 120.5 |
C7—N1—C6 | 125.71 (17) | C10—C11—C12 | 121.68 (18) |
C7—N1—H1N1 | 115.0 (17) | C10—C11—H11A | 119.2 |
C6—N1—H1N1 | 117.7 (16) | C12—C11—H11A | 119.2 |
C13—N2—N3 | 119.15 (15) | C11—C12—C7 | 119.14 (17) |
C13—N2—H1N2 | 121.9 (15) | C11—C12—C13 | 119.70 (17) |
N3—N2—H1N2 | 118.9 (15) | C7—C12—C13 | 121.12 (16) |
C14—N3—N2 | 114.37 (15) | O1—C13—N2 | 121.08 (17) |
C2—C1—C6 | 120.20 (18) | O1—C13—C12 | 123.01 (16) |
C2—C1—H1A | 119.9 | N2—C13—C12 | 115.90 (15) |
C6—C1—H1A | 119.9 | N3—C14—C15 | 120.51 (17) |
C1—C2—C3 | 119.58 (18) | N3—C14—H14A | 119.7 |
C1—C2—H2A | 120.2 | C15—C14—H14A | 119.7 |
C3—C2—H2A | 120.2 | C16—C15—C14 | 126.67 (17) |
C4—C3—C2 | 120.99 (19) | C16—C15—S1 | 111.12 (15) |
C4—C3—H3A | 119.5 | C14—C15—S1 | 121.70 (14) |
C2—C3—H3A | 119.5 | C15—C16—C17 | 112.75 (18) |
C3—C4—C5 | 120.02 (17) | C15—C16—H16A | 123.6 |
C3—C4—C19 | 119.07 (18) | C17—C16—H16A | 123.6 |
C5—C4—C19 | 120.90 (17) | C18—C17—C16 | 112.26 (18) |
C6—C5—C4 | 118.19 (17) | C18—C17—H17A | 123.9 |
C6—C5—C20 | 121.03 (17) | C16—C17—H17A | 123.9 |
C4—C5—C20 | 120.76 (17) | C17—C18—S1 | 112.46 (16) |
C1—C6—C5 | 120.97 (18) | C17—C18—H18A | 123.8 |
C1—C6—N1 | 119.99 (17) | S1—C18—H18A | 123.8 |
C5—C6—N1 | 118.97 (17) | C4—C19—H19A | 109.5 |
N1—C7—C8 | 121.51 (18) | C4—C19—H19B | 109.5 |
N1—C7—C12 | 120.46 (17) | H19A—C19—H19B | 109.5 |
C8—C7—C12 | 117.96 (17) | C4—C19—H19C | 109.5 |
C9—C8—C7 | 121.33 (19) | H19A—C19—H19C | 109.5 |
C9—C8—H8A | 119.3 | H19B—C19—H19C | 109.5 |
C7—C8—H8A | 119.3 | C5—C20—H20A | 109.5 |
C8—C9—C10 | 120.95 (18) | C5—C20—H20B | 109.5 |
C8—C9—H9A | 119.5 | H20A—C20—H20B | 109.5 |
C10—C9—H9A | 119.5 | C5—C20—H20C | 109.5 |
C11—C10—C9 | 118.90 (18) | H20A—C20—H20C | 109.5 |
C11—C10—H10A | 120.5 | H20B—C20—H20C | 109.5 |
C13—N2—N3—C14 | −177.33 (16) | C9—C10—C11—C12 | 0.1 (3) |
C6—C1—C2—C3 | −1.3 (3) | C10—C11—C12—C7 | 1.5 (3) |
C1—C2—C3—C4 | −0.7 (3) | C10—C11—C12—C13 | 178.95 (17) |
C2—C3—C4—C5 | 1.6 (3) | N1—C7—C12—C11 | −179.49 (18) |
C2—C3—C4—C19 | −177.56 (18) | C8—C7—C12—C11 | −2.7 (3) |
C3—C4—C5—C6 | −0.4 (3) | N1—C7—C12—C13 | 3.1 (3) |
C19—C4—C5—C6 | 178.70 (18) | C8—C7—C12—C13 | 179.91 (17) |
C3—C4—C5—C20 | −178.59 (18) | N3—N2—C13—O1 | 13.8 (3) |
C19—C4—C5—C20 | 0.6 (3) | N3—N2—C13—C12 | −165.63 (15) |
C2—C1—C6—C5 | 2.5 (3) | C11—C12—C13—O1 | −155.40 (18) |
C2—C1—C6—N1 | 179.59 (18) | C7—C12—C13—O1 | 22.0 (3) |
C4—C5—C6—C1 | −1.6 (3) | C11—C12—C13—N2 | 24.0 (2) |
C20—C5—C6—C1 | 176.56 (18) | C7—C12—C13—N2 | −158.62 (17) |
C4—C5—C6—N1 | −178.73 (17) | N2—N3—C14—C15 | −170.89 (16) |
C20—C5—C6—N1 | −0.6 (3) | N3—C14—C15—C16 | 176.61 (19) |
C7—N1—C6—C1 | 49.4 (3) | N3—C14—C15—S1 | 5.5 (3) |
C7—N1—C6—C5 | −133.4 (2) | C18—S1—C15—C16 | 0.06 (15) |
C6—N1—C7—C8 | 12.2 (3) | C18—S1—C15—C14 | 172.39 (16) |
C6—N1—C7—C12 | −171.05 (18) | C14—C15—C16—C17 | −171.90 (18) |
N1—C7—C8—C9 | 179.14 (19) | S1—C15—C16—C17 | 0.0 (2) |
C12—C7—C8—C9 | 2.4 (3) | C15—C16—C17—C18 | 0.0 (3) |
C7—C8—C9—C10 | −0.8 (3) | C16—C17—C18—S1 | 0.1 (2) |
C8—C9—C10—C11 | −0.5 (3) | C15—S1—C18—C17 | −0.07 (16) |
Cg1 and Cg2 are the centroids of the S1/C15–C18 and C1–C6 rings, respectively. |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H1N2···O1i | 0.89 (2) | 1.96 (2) | 2.808 (2) | 160 (2) |
N1—H1N1···O1 | 0.85 (2) | 2.02 (3) | 2.704 (2) | 137 (2) |
C1—H1A···O1ii | 0.95 | 2.58 | 3.410 (2) | 146 |
C3—H3A···Cg1iii | 0.95 | 2.98 | 3.732 (2) | 137 |
C9—H9A···Cg2iv | 0.95 | 2.84 | 3.649 (2) | 144 |
Symmetry codes: (i) x, −y+1/2, z+1/2; (ii) −x+1, −y, −z+2; (iii) −x+1, y−1/2, −z+3/2; (iv) x, y, z+1. |
Experimental details
Crystal data | |
Chemical formula | C20H19N3OS |
Mr | 349.44 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 100 |
a, b, c (Å) | 14.0922 (14), 15.9682 (15), 8.1338 (8) |
β (°) | 105.344 (2) |
V (Å3) | 1765.1 (3) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.20 |
Crystal size (mm) | 0.34 × 0.07 × 0.04 |
Data collection | |
Diffractometer | Bruker APEX DUO CCD |
Absorption correction | Multi-scan (SADABS; Bruker, 2009) |
Tmin, Tmax | 0.936, 0.992 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 14626, 5082, 3338 |
Rint | 0.067 |
(sin θ/λ)max (Å−1) | 0.704 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.051, 0.128, 1.01 |
No. of reflections | 5082 |
No. of parameters | 236 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.37, −0.35 |
Computer programs: APEX2 (Bruker, 2009), SAINT (Bruker, 2009), SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).
Cg1 and Cg2 are the centroids of the S1/C15–C18 and C1–C6 rings, respectively. |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H1N2···O1i | 0.89 (2) | 1.96 (2) | 2.808 (2) | 160 (2) |
N1—H1N1···O1 | 0.85 (2) | 2.02 (3) | 2.704 (2) | 137 (2) |
C1—H1A···O1ii | 0.95 | 2.5800 | 3.410 (2) | 146 |
C3—H3A···Cg1iii | 0.95 | 2.98 | 3.732 (2) | 137 |
C9—H9A···Cg2iv | 0.95 | 2.84 | 3.649 (2) | 144 |
Symmetry codes: (i) x, −y+1/2, z+1/2; (ii) −x+1, −y, −z+2; (iii) −x+1, y−1/2, −z+3/2; (iv) x, y, z+1. |
Footnotes
‡Thomson Reuters ResearcherID: A-3561-2009.
Acknowledgements
HKF and TSC thank Universiti Sains Malaysia (USM) for a Research University Grant (No. 1001/PFIZIK/811160). TSC thanks the Malaysian government and USM for the award of a Research Fellowship. The authors thank the Deanship of Scientific Research and the Research Center, College of Pharmacy, King Saud University, for funding and facilities.
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.
In view of the importance of the chemistry and biological activity of diaryl amines (Reddy et al., 2010) and in continuation to our interest in the chemistry of hydrazones (Bhat et al., 2012a,b,c), we report herein the crystal structure of the title compound.
The asymmetric unit of the title compound is shown in Fig. 1. The central benzene ring [C7–C12] makes dihedral angles of 45.36 (9)° and 55.33 (9)° with the thiophene ring [S1/C15–C18] and dimethyl-substituted benzene ring [C1–C6], respectively. The dihedral angle between the thiophene ring and C1–C6 benzene ring is 83.60 (9)°. The thiophene ring and C7–C12 benzene ring are twisted from the mean plane of C13(═O1)—N2—N3═C14 bridge [maximum deviation = 0.0860 (13) Å at atom N3] with dihedral angles of 23.86 (9)° and 24.77 (8)°, respectively. An intramolecular N1—H1N1···O1 hydrogen bond generates an S(6) ring motif (Bernstein et al., 1995) in the molecule. Bond lengths (Allen et al., 1987) and angles are within normal ranges and are comparable to those found in related structures (Tian et al., 2010; Wang et al., 2010).
In the crystal (Fig. 2), molecules are linked by N2—H1N2···O1 and C1—H1A···O1 hydrogen bonds, with the same O atom acting as the acceptor, into sheets parallel to bc plane. The crystal packing also features C—H···π interactions (Table 1), involving Cg1 and Cg2 which are the centroids of S1/C15–C18 and C1–C6 rings, respectively.