organic compounds
4-Amino-3-{1-[4-(2-methylpropyl)phenyl]ethyl}-1H-1,2,4-triazole-5(4H)-thione
aX-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia, bDepartment of Studies in Chemistry, Mangalore University, Mangalagangotri, Mangalore 574 199, India, cDepartment of Studies in Physics, Mangalore University, Mangalagangotri, Mangalore 574 199, India, and dCrystal Materials Research Unit, Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand
*Correspondence e-mail: hkfun@usm.my
In the title triazole compound, C14H20N4S, the dihedral angle between the triazole and benzene rings is 83.29 (11)°. The methine H atom and two methyl groups of the isobutyl group are disordered over two sites with occupancies of 0.684 (9) and 0.316 (9). In the N—H⋯S hydrogen bonds link the molecules into chains running along the b axis. These chains are cross-linked into a two-dimensional network parallel to the ab plane by C—H⋯S hydrogen bonds.
Related literature
For bond-length data, see: Allen et al. (1987). For related structures, see: Fun et al. (2008a,b,c). For the activities and applications of 1,2,4-triazole derivatives, see: Bhat et al. (2004); Holla et al. (2002); Karthikeyan et al. (2007); Raafat et al. (2006); Wei et al. (2007).
Experimental
Crystal data
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Data collection: APEX2 (Bruker, 2005); cell APEX2; data reduction: SAINT (Bruker, 2005); 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, 2003).
Supporting information
10.1107/S1600536808022794/ci2633sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536808022794/ci2633Isup2.hkl
The title compound was prepared by following the literature procedure (Karthikeyan et al., 2007). The solid product obtained was collected by filtration, washed with ethanol and dried. Colourless single crystals suitable for X-ray analysis were obtained from an ethanol solution by slow evaporation (yield 61%; m.p. 423–424 K).
The methylpropyl group is disordered over two orientations with refined occupancies of 0.685 (8) and 0.315 (8). During
bond distances involving C12, C13, C12A and C13A atoms were restrained to 1.530 (7) Å, and their displacement parameters were restrained to an approximate isotropic behaviour. H atoms attached to N4 were located in a difference map and refined freely. The remaining H atoms were placed in calculated positions [N-H = 0.88 Å, C-H = 0.95-1.00 Å] and refined using a riding-model with Uiso(H) = 1.5Ueq(Cmethyl) and 1.2Ueq(C,N).Data collection: APEX2 (Bruker, 2005); cell
APEX2 (Bruker, 2005); data reduction: SAINT (Bruker, 2005); 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, 2003).C14H20N4S | F(000) = 296 |
Mr = 276.41 | Dx = 1.227 Mg m−3 |
Monoclinic, P21 | Melting point = 423–424 K |
Hall symbol: P 2yb | Mo Kα radiation, λ = 0.71073 Å |
a = 5.9720 (3) Å | Cell parameters from 3612 reflections |
b = 8.5153 (5) Å | θ = 2.8–30.0° |
c = 14.8271 (6) Å | µ = 0.21 mm−1 |
β = 97.223 (3)° | T = 100 K |
V = 748.03 (7) Å3 | Block, colourless |
Z = 2 | 0.58 × 0.39 × 0.13 mm |
Bruker SMART APEXII CCD area-detector diffractometer | 3612 independent reflections |
Radiation source: fine-focus sealed tube | 3295 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.029 |
Detector resolution: 8.33 pixels mm-1 | θmax = 30.0°, θmin = 2.8° |
ω scans | h = −8→8 |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | k = −11→11 |
Tmin = 0.888, Tmax = 0.974 | l = −20→20 |
10373 measured reflections |
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)] = 0.046 | H atoms treated by a mixture of independent and constrained refinement |
wR(F2) = 0.119 | w = 1/[σ2(Fo2) + (0.0623P)2 + 0.2342P] where P = (Fo2 + 2Fc2)/3 |
S = 1.07 | (Δ/σ)max = 0.001 |
3612 reflections | Δρmax = 0.74 e Å−3 |
199 parameters | Δρmin = −0.54 e Å−3 |
29 restraints | Absolute structure: Flack (1983), 1293 Friedel pairs |
Primary atom site location: structure-invariant direct methods | Absolute structure parameter: 0.05 (9) |
C14H20N4S | V = 748.03 (7) Å3 |
Mr = 276.41 | Z = 2 |
Monoclinic, P21 | Mo Kα radiation |
a = 5.9720 (3) Å | µ = 0.21 mm−1 |
b = 8.5153 (5) Å | T = 100 K |
c = 14.8271 (6) Å | 0.58 × 0.39 × 0.13 mm |
β = 97.223 (3)° |
Bruker SMART APEXII CCD area-detector diffractometer | 3612 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | 3295 reflections with I > 2σ(I) |
Tmin = 0.888, Tmax = 0.974 | Rint = 0.029 |
10373 measured reflections |
R[F2 > 2σ(F2)] = 0.046 | H atoms treated by a mixture of independent and constrained refinement |
wR(F2) = 0.119 | Δρmax = 0.74 e Å−3 |
S = 1.07 | Δρmin = −0.54 e Å−3 |
3612 reflections | Absolute structure: Flack (1983), 1293 Friedel pairs |
199 parameters | Absolute structure parameter: 0.05 (9) |
29 restraints |
Experimental. The low-temperature data was collected with the Oxford Cyrosystem Cobra low-temperature attachment. |
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 | Occ. (<1) | |
S1 | 0.52913 (8) | 0.63928 (8) | 0.56907 (3) | 0.02823 (14) | |
N1 | 0.3013 (3) | 0.7737 (3) | 0.41731 (11) | 0.0254 (4) | |
H1 | 0.3880 | 0.8576 | 0.4194 | 0.030* | |
N2 | 0.1200 (3) | 0.7497 (3) | 0.35093 (12) | 0.0268 (4) | |
N3 | 0.1622 (3) | 0.5540 (3) | 0.44853 (12) | 0.0255 (4) | |
N4 | 0.1075 (4) | 0.4156 (3) | 0.49036 (14) | 0.0304 (5) | |
H4A | 0.205 (5) | 0.349 (4) | 0.477 (2) | 0.036 (8)* | |
H4B | 0.120 (6) | 0.435 (5) | 0.551 (2) | 0.050 (9)* | |
C1 | 0.3316 (3) | 0.6572 (3) | 0.47770 (12) | 0.0236 (4) | |
C2 | 0.0397 (3) | 0.6138 (3) | 0.37174 (13) | 0.0242 (5) | |
C3 | −0.1391 (4) | 0.5226 (3) | 0.31435 (13) | 0.0262 (5) | |
H3 | −0.2464 | 0.4790 | 0.3546 | 0.031* | |
C4 | −0.0251 (3) | 0.3868 (3) | 0.27194 (13) | 0.0245 (4) | |
C5 | −0.1039 (4) | 0.2344 (3) | 0.27769 (15) | 0.0304 (5) | |
H5 | −0.2342 | 0.2154 | 0.3068 | 0.037* | |
C6 | 0.0035 (4) | 0.1101 (3) | 0.24192 (15) | 0.0299 (5) | |
H6 | −0.0538 | 0.0068 | 0.2468 | 0.036* | |
C7 | 0.1950 (3) | 0.1335 (4) | 0.19865 (12) | 0.0275 (4) | |
C8 | 0.2718 (4) | 0.2844 (4) | 0.19190 (16) | 0.0324 (6) | |
H8 | 0.4009 | 0.3031 | 0.1620 | 0.039* | |
C9 | 0.1650 (4) | 0.4104 (3) | 0.22788 (15) | 0.0291 (5) | |
H9 | 0.2220 | 0.5137 | 0.2224 | 0.035* | |
C10 | 0.3109 (4) | −0.0036 (4) | 0.15975 (16) | 0.0368 (6) | |
H10A | 0.2910 | −0.0980 | 0.1969 | 0.044* | |
H10B | 0.4747 | 0.0186 | 0.1643 | 0.044* | |
C11 | 0.2221 (5) | −0.0394 (6) | 0.0603 (2) | 0.0730 (14) | |
H11A | 0.2458 | 0.0624 | 0.0293 | 0.088* | 0.685 (8) |
H11B | 0.0645 | −0.0562 | 0.0639 | 0.088* | 0.315 (8) |
C12 | 0.3694 (11) | −0.1501 (9) | 0.0159 (4) | 0.0661 (18) | 0.685 (8) |
H12A | 0.3053 | −0.1668 | −0.0475 | 0.099* | 0.685 (8) |
H12B | 0.3782 | −0.2507 | 0.0483 | 0.099* | 0.685 (8) |
H12C | 0.5210 | −0.1053 | 0.0179 | 0.099* | 0.685 (8) |
C13 | −0.0227 (7) | −0.0626 (7) | 0.0405 (3) | 0.0514 (15) | 0.685 (8) |
H13A | −0.0626 | −0.0822 | −0.0247 | 0.077* | 0.685 (8) |
H13B | −0.1010 | 0.0318 | 0.0578 | 0.077* | 0.685 (8) |
H13C | −0.0679 | −0.1528 | 0.0750 | 0.077* | 0.685 (8) |
C12A | 0.309 (2) | −0.2128 (11) | 0.0475 (8) | 0.057 (3) | 0.315 (8) |
H12D | 0.2612 | −0.2475 | −0.0149 | 0.085* | 0.315 (8) |
H12E | 0.2456 | −0.2831 | 0.0901 | 0.085* | 0.315 (8) |
H12F | 0.4742 | −0.2149 | 0.0595 | 0.085* | 0.315 (8) |
C13A | 0.220 (3) | 0.0688 (16) | −0.0169 (8) | 0.096 (6) | 0.315 (8) |
H13D | 0.1648 | 0.1717 | −0.0002 | 0.144* | 0.315 (8) |
H13E | 0.1214 | 0.0271 | −0.0691 | 0.144* | 0.315 (8) |
H13F | 0.3740 | 0.0797 | −0.0329 | 0.144* | 0.315 (8) |
C14 | −0.2708 (4) | 0.6302 (4) | 0.24338 (15) | 0.0321 (5) | |
H14A | −0.3404 | 0.7156 | 0.2743 | 0.048* | |
H14B | −0.3886 | 0.5693 | 0.2069 | 0.048* | |
H14C | −0.1674 | 0.6742 | 0.2037 | 0.048* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0253 (2) | 0.0327 (3) | 0.0260 (2) | 0.0030 (3) | 0.00040 (16) | −0.0015 (2) |
N1 | 0.0251 (8) | 0.0242 (11) | 0.0263 (8) | 0.0010 (8) | 0.0010 (6) | −0.0027 (7) |
N2 | 0.0252 (9) | 0.0283 (11) | 0.0260 (8) | 0.0019 (9) | 0.0003 (6) | −0.0031 (7) |
N3 | 0.0222 (8) | 0.0301 (11) | 0.0246 (8) | 0.0005 (8) | 0.0050 (6) | 0.0010 (7) |
N4 | 0.0269 (9) | 0.0345 (12) | 0.0308 (9) | −0.0024 (10) | 0.0079 (7) | 0.0085 (9) |
C1 | 0.0222 (8) | 0.0256 (13) | 0.0239 (8) | 0.0026 (10) | 0.0068 (6) | −0.0016 (8) |
C2 | 0.0227 (8) | 0.0280 (14) | 0.0224 (8) | 0.0040 (10) | 0.0045 (6) | 0.0018 (8) |
C3 | 0.0204 (9) | 0.0301 (13) | 0.0286 (9) | −0.0016 (10) | 0.0044 (7) | 0.0001 (9) |
C4 | 0.0204 (9) | 0.0295 (12) | 0.0227 (8) | −0.0003 (10) | −0.0001 (7) | 0.0000 (8) |
C5 | 0.0283 (11) | 0.0333 (14) | 0.0312 (10) | −0.0001 (11) | 0.0095 (8) | 0.0065 (9) |
C6 | 0.0326 (10) | 0.0269 (14) | 0.0302 (9) | −0.0007 (11) | 0.0040 (8) | 0.0039 (9) |
C7 | 0.0235 (8) | 0.0358 (12) | 0.0220 (7) | 0.0045 (13) | −0.0018 (6) | −0.0020 (11) |
C8 | 0.0244 (10) | 0.0444 (16) | 0.0288 (10) | −0.0076 (11) | 0.0054 (8) | −0.0084 (10) |
C9 | 0.0263 (10) | 0.0313 (13) | 0.0304 (10) | −0.0074 (11) | 0.0062 (8) | −0.0041 (9) |
C10 | 0.0319 (12) | 0.0444 (17) | 0.0325 (11) | 0.0092 (13) | −0.0017 (9) | −0.0107 (11) |
C11 | 0.0469 (17) | 0.120 (4) | 0.0501 (17) | 0.028 (2) | −0.0016 (13) | −0.044 (2) |
C12 | 0.072 (4) | 0.077 (4) | 0.053 (3) | 0.008 (3) | 0.028 (3) | −0.029 (3) |
C13 | 0.047 (2) | 0.071 (4) | 0.0333 (18) | −0.003 (2) | −0.0046 (16) | −0.018 (2) |
C12A | 0.040 (5) | 0.092 (8) | 0.040 (5) | −0.005 (5) | 0.006 (4) | −0.021 (5) |
C13A | 0.086 (8) | 0.107 (10) | 0.090 (8) | 0.008 (7) | −0.008 (6) | −0.040 (7) |
C14 | 0.0249 (9) | 0.0328 (13) | 0.0368 (10) | −0.0003 (13) | −0.0027 (7) | 0.0012 (11) |
S1—C1 | 1.688 (2) | C10—C11 | 1.533 (4) |
N1—C1 | 1.334 (3) | C10—H10A | 0.99 |
N1—N2 | 1.384 (2) | C10—H10B | 0.99 |
N1—H1 | 0.8800 | C11—C13 | 1.468 (4) |
N2—C2 | 1.304 (3) | C11—C13A | 1.468 (7) |
N3—C1 | 1.368 (3) | C11—C12 | 1.497 (5) |
N3—C2 | 1.372 (3) | C11—C12A | 1.584 (7) |
N3—N4 | 1.390 (3) | C11—H11A | 1.00 |
N4—H4A | 0.85 (4) | C11—H11B | 0.96 |
N4—H4B | 0.91 (3) | C12—H12A | 0.98 |
C2—C3 | 1.496 (3) | C12—H12B | 0.98 |
C3—C4 | 1.518 (3) | C12—H12C | 0.98 |
C3—C14 | 1.535 (3) | C13—H13A | 0.98 |
C3—H3 | 1.00 | C13—H13B | 0.98 |
C4—C5 | 1.386 (4) | C13—H13C | 0.98 |
C4—C9 | 1.394 (3) | C12A—H12D | 0.98 |
C5—C6 | 1.378 (4) | C12A—H12E | 0.98 |
C5—H5 | 0.95 | C12A—H12F | 0.98 |
C6—C7 | 1.394 (3) | C13A—H13D | 0.98 |
C6—H6 | 0.95 | C13A—H13E | 0.98 |
C7—C8 | 1.372 (4) | C13A—H13F | 0.98 |
C7—C10 | 1.508 (4) | C14—H14A | 0.98 |
C8—C9 | 1.389 (4) | C14—H14B | 0.98 |
C8—H8 | 0.95 | C14—H14C | 0.98 |
C9—H9 | 0.95 | ||
C1—N1—N2 | 113.3 (2) | C13—C11—C10 | 115.8 (3) |
C1—N1—H1 | 123.4 | C13A—C11—C10 | 126.3 (7) |
N2—N1—H1 | 123.4 | C12—C11—C10 | 113.4 (3) |
C2—N2—N1 | 103.96 (18) | C13—C11—C12A | 100.6 (5) |
C1—N3—C2 | 108.67 (19) | C13A—C11—C12A | 117.5 (8) |
C1—N3—N4 | 127.56 (18) | C10—C11—C12A | 102.8 (5) |
C2—N3—N4 | 123.66 (19) | C13—C11—H11A | 102.6 |
N3—N4—H4A | 105 (2) | C12—C11—H11A | 102.6 |
N3—N4—H4B | 107 (3) | C10—C11—H11A | 102.6 |
H4A—N4—H4B | 112 (3) | C12A—C11—H11A | 133.3 |
N1—C1—N3 | 103.48 (17) | C13A—C11—H11B | 103.0 |
N1—C1—S1 | 128.94 (19) | C12—C11—H11B | 124.4 |
N3—C1—S1 | 127.58 (18) | C10—C11—H11B | 101.5 |
N2—C2—N3 | 110.60 (19) | C12A—C11—H11B | 101.9 |
N2—C2—C3 | 125.67 (19) | H11A—C11—H11B | 110.5 |
N3—C2—C3 | 123.2 (2) | C11—C12—H12A | 109.5 |
C2—C3—C4 | 107.83 (17) | C11—C12—H12B | 109.5 |
C2—C3—C14 | 110.3 (2) | H12A—C12—H12B | 109.5 |
C4—C3—C14 | 112.86 (18) | C11—C12—H12C | 109.5 |
C2—C3—H3 | 108.6 | H12A—C12—H12C | 109.5 |
C4—C3—H3 | 108.6 | H12B—C12—H12C | 109.5 |
C14—C3—H3 | 108.6 | C11—C13—H13A | 109.5 |
C5—C4—C9 | 117.8 (2) | H11B—C13—H13A | 133.0 |
C5—C4—C3 | 120.96 (19) | C11—C13—H13B | 109.5 |
C9—C4—C3 | 121.2 (2) | H11B—C13—H13B | 100.7 |
C6—C5—C4 | 121.2 (2) | H13A—C13—H13B | 109.5 |
C6—C5—H5 | 119.4 | C11—C13—H13C | 109.5 |
C4—C5—H5 | 119.4 | H11B—C13—H13C | 92.6 |
C5—C6—C7 | 121.0 (3) | H13A—C13—H13C | 109.5 |
C5—C6—H6 | 119.5 | H13B—C13—H13C | 109.5 |
C7—C6—H6 | 119.5 | C11—C12A—H12D | 109.5 |
C8—C7—C6 | 117.9 (3) | C11—C12A—H12E | 109.5 |
C8—C7—C10 | 121.6 (2) | H12D—C12A—H12E | 109.5 |
C6—C7—C10 | 120.5 (3) | C11—C12A—H12F | 109.5 |
C7—C8—C9 | 121.4 (2) | H12D—C12A—H12F | 109.5 |
C7—C8—H8 | 119.3 | H12E—C12A—H12F | 109.5 |
C9—C8—H8 | 119.3 | C11—C13A—H13D | 109.5 |
C8—C9—C4 | 120.6 (2) | C11—C13A—H13E | 109.5 |
C8—C9—H9 | 119.7 | H13D—C13A—H13E | 109.5 |
C4—C9—H9 | 119.7 | C11—C13A—H13F | 109.5 |
C7—C10—C11 | 113.7 (2) | H13D—C13A—H13F | 109.5 |
C7—C10—H10A | 108.8 | H13E—C13A—H13F | 109.5 |
C11—C10—H10A | 108.8 | C3—C14—H14A | 109.5 |
C7—C10—H10B | 108.8 | C3—C14—H14B | 109.5 |
C11—C10—H10B | 108.8 | H14A—C14—H14B | 109.5 |
H10A—C10—H10B | 107.7 | C3—C14—H14C | 109.5 |
C13—C11—C13A | 91.1 (8) | H14A—C14—H14C | 109.5 |
C13—C11—C12 | 116.9 (4) | H14B—C14—H14C | 109.5 |
C13A—C11—C12 | 90.0 (8) | ||
C1—N1—N2—C2 | −0.4 (2) | C2—C3—C4—C9 | −49.2 (3) |
N2—N1—C1—N3 | 0.1 (2) | C14—C3—C4—C9 | 72.9 (3) |
N2—N1—C1—S1 | −179.58 (16) | C9—C4—C5—C6 | 0.7 (3) |
C2—N3—C1—N1 | 0.3 (2) | C3—C4—C5—C6 | −177.8 (2) |
N4—N3—C1—N1 | −175.8 (2) | C4—C5—C6—C7 | −0.1 (3) |
C2—N3—C1—S1 | 179.98 (16) | C5—C6—C7—C8 | −0.7 (3) |
N4—N3—C1—S1 | 3.8 (3) | C5—C6—C7—C10 | −180.0 (2) |
N1—N2—C2—N3 | 0.6 (2) | C6—C7—C8—C9 | 0.8 (3) |
N1—N2—C2—C3 | −171.3 (2) | C10—C7—C8—C9 | −179.9 (2) |
C1—N3—C2—N2 | −0.6 (2) | C7—C8—C9—C4 | −0.2 (4) |
N4—N3—C2—N2 | 175.7 (2) | C5—C4—C9—C8 | −0.6 (3) |
C1—N3—C2—C3 | 171.53 (18) | C3—C4—C9—C8 | 177.9 (2) |
N4—N3—C2—C3 | −12.1 (3) | C8—C7—C10—C11 | −88.8 (3) |
N2—C2—C3—C4 | 105.2 (3) | C6—C7—C10—C11 | 90.4 (3) |
N3—C2—C3—C4 | −65.8 (2) | C7—C10—C11—C13 | −53.8 (5) |
N2—C2—C3—C14 | −18.5 (3) | C7—C10—C11—C13A | 58.6 (10) |
N3—C2—C3—C14 | 170.53 (19) | C7—C10—C11—C12 | 167.1 (4) |
C2—C3—C4—C5 | 129.3 (2) | C7—C10—C11—C12A | −162.4 (5) |
C14—C3—C4—C5 | −108.6 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···S1i | 0.88 | 2.45 | 3.272 (3) | 155 |
N4—H4A···S1ii | 0.85 (3) | 2.54 (3) | 3.392 (3) | 176 (3) |
C5—H5···S1iii | 0.95 | 2.78 | 3.704 (2) | 165 |
Symmetry codes: (i) −x+1, y+1/2, −z+1; (ii) −x+1, y−1/2, −z+1; (iii) −x, y−1/2, −z+1. |
Experimental details
Crystal data | |
Chemical formula | C14H20N4S |
Mr | 276.41 |
Crystal system, space group | Monoclinic, P21 |
Temperature (K) | 100 |
a, b, c (Å) | 5.9720 (3), 8.5153 (5), 14.8271 (6) |
β (°) | 97.223 (3) |
V (Å3) | 748.03 (7) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.21 |
Crystal size (mm) | 0.58 × 0.39 × 0.13 |
Data collection | |
Diffractometer | Bruker SMART APEXII CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2005) |
Tmin, Tmax | 0.888, 0.974 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 10373, 3612, 3295 |
Rint | 0.029 |
(sin θ/λ)max (Å−1) | 0.703 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.046, 0.119, 1.07 |
No. of reflections | 3612 |
No. of parameters | 199 |
No. of restraints | 29 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.74, −0.54 |
Absolute structure | Flack (1983), 1293 Friedel pairs |
Absolute structure parameter | 0.05 (9) |
Computer programs: APEX2 (Bruker, 2005), SAINT (Bruker, 2005), SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2003).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···S1i | 0.88 | 2.45 | 3.272 (3) | 155 |
N4—H4A···S1ii | 0.85 (3) | 2.54 (3) | 3.392 (3) | 176 (3) |
C5—H5···S1iii | 0.95 | 2.78 | 3.704 (2) | 165 |
Symmetry codes: (i) −x+1, y+1/2, −z+1; (ii) −x+1, y−1/2, −z+1; (iii) −x, y−1/2, −z+1. |
Footnotes
‡Additional correspondence author, e-mail: suchada.c@psu.ac.th.
Acknowledgements
KVS and BK are grateful to the Kerala State Council for Science Technology and the Environment, Thiruvananthapuram, for financial assistance. The authors also thank Universiti Sains Malaysia for the Research University Golden Goose grant No. 1001/PFIZIK/811012.
References
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In recent decades, a large number of reports concerning 4-amino-1,2,4-triazol-3-thiones have appeared owing to a wide variety of their biological activity. The 1,2,4-triazole nucleus has been incorporated into a wide variety of therapeutically interesting drug candidates, including H1/H2 histamine receptor blockers, cholinesterase-active agents, CNS stimulants, antianxiety agents, and sedatives (Bhat et al., 2004). The amino and thione groups are ready-made nucleophilic centers for the synthesis of condensed nitrogen and sulfur heterocyclic rings, e.g., triazolothiadiazoles, triazolothiadiazines and triazolothiadiazepines (Raafat et al., 2006). Substituted derivatives of triazole possess comprehensive bioactivities such as antimicrobial, anti-inflammatory, analgesic, antitumorial, antihypertensive, anticonvulsant and antiviral activities (Wei et al., 2007). The broad biological activities that the 1,2,4-triazoles shown may be due to the presence of the >N—C—S moiety (Holla et al., 2002). Due to the progress that occurs in dealing with the chemistry of substituted 4-amino-1,2,4-triazole-3-thiones as well as their biological activity, we report here the crystal structure of the title triazole compound.
The bond distances and angles in the title molecule (Fig .1) have normal values (Allen et al., 1987) and are comparable with those observed in related structures (Fun et al., 2008a,b,c). The triazole ring (C1/C2/N1-N3) is planar to within ±0.004 Å. The chiral carbon atom C3 is in a distorted tetrahedral configuration. The dihedral angle between the triazole and benzene (C4-C9) rings is 83.29 (11)°. The 2-methylpropyl group is disordered over two sites. The orientation of this group with respect to the benzene ring can be indicated by the torsion angles C7–C10–C11–C12 = 167.1 (4)° and C7–C10–C11–C13 = -53.8 (5)° [C7–C10–C11–C12A = -162.4 (5)° and C7–C10–C11–C13A = 58.6 (10)° for the minor component].
In the crystal packing, the molecules are linked into chains along the b axis by N—H···S hydrogen bonds (Fig. 2). These chains are cross-linked into a two dimensional network parallel to the ab plane by C—H···S hydrogen bonds (Table 1).