organic compounds
3-(Adamantan-1-yl)-4-(prop-2-en-1-yl)-1H-1,2,4-triazole-5(4H)-thione
aDepartment of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia, bDepartment of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia, and cChemistry Department, Faculty of Science, King Abdulaziz University, PO Box 80203 Jeddah, Saudi Arabia
*Correspondence e-mail: edward.tiekink@gmail.com
The title molecule, C15H21N3S, exists as the thione tautomer in the solid state. The 1,2,4-triazole ring is almost planar (r.m.s. deviation = 0.004 Å) and the prop-2-en-1-yl chain is close to being perpendicular to this plane [C—N—C—C torsion angle = 77.1 (5)°]. In the crystal, centrosymmetric dimeric aggregates are formed by pairs of N—H⋯S hydrogen bonds as parts of eight-membered (⋯HNCS)2 synthons. These are connected into layers parallel to (101) via C—H⋯π interactions, where the π-system is the triazole ring. The investigated sample was a nonmerohedral twin; the refined domain ratio was 0.655 (4):0.345 (4).
Related literature
For the biological activity of adamantyl derivatives, see: Vernier et al. (1969); El-Emam et al. (2004). Kadi et al. (2007, 2010). For the biological activity of adamantyl-1,2,4-triazole derivatives, see: Al-Deeb et al. (2006). For the separation of diffraction data into twin domains, see: Spek (2009).
Experimental
Crystal data
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Refinement
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Data collection: CrysAlis PRO (Agilent, 2011); cell CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 2006); software used to prepare material for publication: publCIF (Westrip, 2010).
Supporting information
10.1107/S1600536812005065/hb6626sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536812005065/hb6626Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536812005065/hb6626Isup3.cml
A mixture of adamantane-1-carbohydrazide (1.94 g, 0.01 mol) and allyl isothiocyanate (0.99 g, 0.01 mol), in ethanol (10 ml) was heated under reflux with stirring for one hour and the solvent was distilled off in vacuo. Aqueous sodium hydroxide (10%, 15 ml) was added to the residue and the mixture was heated under reflux for 2 h then filtered hot. On cooling, the mixture was acidified with hydrochloric acid and the precipitated crude product was filtered, washed with water, dried and crystallized from aqueous ethanol to yield 2.18 g (79%) of (I) as colourless prisms. m.p. 468–470 K. 1H NMR (CDCl3): δ 1.75–1.83 (m, 6H, adamantane-H), 1.94 (s, 3H, adamantane-H), 2.05 (s, 6H, adamantane-H), 4.91 (s, 2H, CH2), 5.03 (d, 1H, ═CHa, J = 17.0 Hz), 5.30 (d, 1H, ═CHb, J = 10.5 Hz), 5.90–5.96 (m, 1H, –CH═), 11.78 (br s, 1H, NH). 13C NMR: δ 27.88, 35.52, 36.27, 38.58 (adamantane-C), 47.66 (CH2), 117.92 (═CH2), 131.03 (–CH═), 158.34 (C═N), 168.61 (C═S).
Carbon-bound H atoms were placed in calculated positions [N—H = 0.88 Å and C—H = 0.95 to 1.00 Å, Uiso(H) = 1.2Ueq(N, C)] and were included in the
in the riding model approximation.A sphere of reflections was measured, which should be sufficient to refine the non-merohedral twinned structure. However, separating the reflection data into two domains did not lead to an improvement in the
and this was not improved at varying degrees of overlap. The twin domains were instead separated by using the TwinRotMat routine of PLATON (Spek, 2009). The minor twin component refined to 34.5 (4)%.Two reflections, i.e. (10 3 5) and (5 0 1), were omitted owing to poor agreement.
Data collection: CrysAlis PRO (Agilent, 2011); cell
CrysAlis PRO (Agilent, 2011); data reduction: CrysAlis PRO (Agilent, 2011); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 2006); software used to prepare material for publication: publCIF (Westrip, 2010).C15H21N3S | F(000) = 592 |
Mr = 275.41 | Dx = 1.264 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 1371 reflections |
a = 13.5833 (17) Å | θ = 2.4–27.5° |
b = 8.6483 (6) Å | µ = 0.22 mm−1 |
c = 13.6973 (14) Å | T = 100 K |
β = 115.938 (14)° | Prism, colourless |
V = 1447.0 (3) Å3 | 0.35 × 0.15 × 0.10 mm |
Z = 4 |
Agilent SuperNova Dual diffractometer with Atlas detector | 3324 independent reflections |
Radiation source: SuperNova (Mo) X-ray Source | 2875 reflections with I > 2σ(I) |
Mirror monochromator | Rint = 0.077 |
Detector resolution: 10.4041 pixels mm-1 | θmax = 27.6°, θmin = 2.8° |
ω scans | h = −17→15 |
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2011) | k = −11→11 |
Tmin = 0.929, Tmax = 0.979 | l = −6→17 |
10998 measured reflections |
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)] = 0.081 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.230 | H-atom parameters constrained |
S = 1.17 | w = 1/[σ2(Fo2) + (0.0882P)2 + 4.0546P] where P = (Fo2 + 2Fc2)/3 |
3324 reflections | (Δ/σ)max < 0.001 |
173 parameters | Δρmax = 0.71 e Å−3 |
0 restraints | Δρmin = −0.66 e Å−3 |
C15H21N3S | V = 1447.0 (3) Å3 |
Mr = 275.41 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 13.5833 (17) Å | µ = 0.22 mm−1 |
b = 8.6483 (6) Å | T = 100 K |
c = 13.6973 (14) Å | 0.35 × 0.15 × 0.10 mm |
β = 115.938 (14)° |
Agilent SuperNova Dual diffractometer with Atlas detector | 3324 independent reflections |
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2011) | 2875 reflections with I > 2σ(I) |
Tmin = 0.929, Tmax = 0.979 | Rint = 0.077 |
10998 measured reflections |
R[F2 > 2σ(F2)] = 0.081 | 0 restraints |
wR(F2) = 0.230 | H-atom parameters constrained |
S = 1.17 | Δρmax = 0.71 e Å−3 |
3324 reflections | Δρmin = −0.66 e Å−3 |
173 parameters |
Geometry. All s.u.'s (except the s.u. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell s.u.'s are taken into account individually in the estimation of s.u.'s in distances, angles and torsion angles; correlations between s.u.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell s.u.'s is used for estimating s.u.'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 > 2σ(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 | 0.60052 (9) | 0.72236 (11) | 0.51878 (8) | 0.0170 (3) | |
N1 | 0.6426 (3) | 0.7440 (4) | 0.7336 (3) | 0.0115 (6) | |
N2 | 0.5548 (3) | 0.5391 (4) | 0.6557 (3) | 0.0137 (7) | |
H2N | 0.5203 | 0.4685 | 0.6062 | 0.016* | |
N3 | 0.5707 (3) | 0.5286 (4) | 0.7620 (3) | 0.0141 (7) | |
C1 | 0.5976 (3) | 0.6683 (5) | 0.6357 (3) | 0.0127 (7) | |
C2 | 0.6240 (3) | 0.6536 (4) | 0.8078 (3) | 0.0124 (7) | |
C3 | 0.6643 (3) | 0.6857 (5) | 0.9271 (3) | 0.0124 (7) | |
C4 | 0.7912 (3) | 0.6936 (5) | 0.9857 (3) | 0.0152 (8) | |
H4A | 0.8224 | 0.5954 | 0.9747 | 0.018* | |
H4B | 0.8173 | 0.7784 | 0.9544 | 0.018* | |
C5 | 0.8298 (4) | 0.7216 (5) | 1.1068 (3) | 0.0190 (9) | |
H5 | 0.9115 | 0.7286 | 1.1435 | 0.023* | |
C6 | 0.7923 (4) | 0.5877 (6) | 1.1559 (3) | 0.0238 (10) | |
H6A | 0.8176 | 0.6052 | 1.2346 | 0.029* | |
H6B | 0.8245 | 0.4895 | 1.1462 | 0.029* | |
C7 | 0.6670 (4) | 0.5770 (6) | 1.0993 (3) | 0.0222 (9) | |
H7 | 0.6429 | 0.4885 | 1.1307 | 0.027* | |
C8 | 0.6281 (3) | 0.5500 (5) | 0.9779 (3) | 0.0176 (8) | |
H8A | 0.5473 | 0.5411 | 0.9419 | 0.021* | |
H8B | 0.6592 | 0.4520 | 0.9665 | 0.021* | |
C9 | 0.6144 (3) | 0.8368 (5) | 0.9470 (3) | 0.0170 (8) | |
H9A | 0.6361 | 0.9254 | 0.9149 | 0.020* | |
H9B | 0.5335 | 0.8296 | 0.9113 | 0.020* | |
C10 | 0.6547 (4) | 0.8630 (6) | 1.0692 (3) | 0.0228 (10) | |
H10 | 0.6233 | 0.9618 | 1.0813 | 0.027* | |
C11 | 0.7803 (4) | 0.8738 (6) | 1.1234 (3) | 0.0232 (9) | |
H11A | 0.8069 | 0.8941 | 1.2020 | 0.028* | |
H11B | 0.8037 | 0.9605 | 1.0914 | 0.028* | |
C12 | 0.6173 (4) | 0.7278 (6) | 1.1179 (4) | 0.0263 (11) | |
H12A | 0.5364 | 0.7208 | 1.0826 | 0.032* | |
H12B | 0.6419 | 0.7447 | 1.1966 | 0.032* | |
C13 | 0.6875 (3) | 0.9016 (5) | 0.7431 (3) | 0.0157 (8) | |
H13A | 0.7316 | 0.9079 | 0.7017 | 0.019* | |
H13B | 0.7365 | 0.9237 | 0.8202 | 0.019* | |
C14 | 0.5979 (4) | 1.0210 (5) | 0.7008 (3) | 0.0180 (8) | |
H14 | 0.5409 | 1.0080 | 0.6295 | 0.022* | |
C15 | 0.5939 (4) | 1.1433 (5) | 0.7573 (4) | 0.0234 (10) | |
H15A | 0.6497 | 1.1593 | 0.8288 | 0.035* | |
H15B | 0.5353 | 1.2149 | 0.7264 | 0.035* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0220 (6) | 0.0180 (5) | 0.0114 (5) | −0.0044 (4) | 0.0077 (4) | −0.0016 (4) |
N1 | 0.0121 (15) | 0.0121 (14) | 0.0112 (15) | −0.0009 (13) | 0.0058 (12) | 0.0001 (12) |
N2 | 0.0165 (16) | 0.0116 (15) | 0.0109 (14) | −0.0005 (13) | 0.0039 (12) | −0.0013 (12) |
N3 | 0.0173 (16) | 0.0125 (16) | 0.0114 (15) | 0.0001 (13) | 0.0051 (12) | −0.0014 (12) |
C1 | 0.0131 (17) | 0.0137 (18) | 0.0104 (16) | 0.0001 (15) | 0.0043 (13) | −0.0016 (14) |
C2 | 0.0137 (18) | 0.0119 (17) | 0.0127 (17) | −0.0005 (14) | 0.0067 (14) | 0.0010 (14) |
C3 | 0.0135 (18) | 0.0150 (18) | 0.0108 (16) | −0.0018 (15) | 0.0073 (14) | 0.0003 (14) |
C4 | 0.0156 (19) | 0.0188 (19) | 0.0121 (17) | −0.0012 (16) | 0.0070 (14) | 0.0014 (15) |
C5 | 0.0162 (19) | 0.025 (2) | 0.0129 (18) | −0.0087 (17) | 0.0038 (15) | 0.0021 (16) |
C6 | 0.023 (2) | 0.031 (2) | 0.0132 (18) | −0.0073 (19) | 0.0042 (16) | 0.0063 (17) |
C7 | 0.023 (2) | 0.029 (2) | 0.0146 (18) | −0.0090 (19) | 0.0088 (16) | 0.0029 (17) |
C8 | 0.0174 (19) | 0.019 (2) | 0.0155 (18) | −0.0065 (16) | 0.0063 (15) | 0.0016 (15) |
C9 | 0.0181 (19) | 0.0167 (19) | 0.0173 (19) | −0.0002 (16) | 0.0087 (16) | −0.0039 (15) |
C10 | 0.026 (2) | 0.030 (2) | 0.0175 (19) | −0.0006 (19) | 0.0137 (17) | −0.0061 (17) |
C11 | 0.027 (2) | 0.029 (2) | 0.0150 (18) | −0.0116 (19) | 0.0107 (17) | −0.0096 (17) |
C12 | 0.024 (2) | 0.043 (3) | 0.016 (2) | −0.009 (2) | 0.0134 (17) | −0.0073 (19) |
C13 | 0.0161 (19) | 0.015 (2) | 0.0144 (17) | −0.0059 (15) | 0.0054 (15) | −0.0007 (14) |
C14 | 0.021 (2) | 0.0132 (18) | 0.0178 (18) | −0.0031 (16) | 0.0071 (16) | 0.0015 (15) |
C15 | 0.030 (2) | 0.015 (2) | 0.024 (2) | −0.0007 (18) | 0.0103 (18) | 0.0003 (17) |
S1—C1 | 1.685 (4) | C7—C12 | 1.539 (7) |
N1—C1 | 1.372 (5) | C7—H7 | 1.0000 |
N1—C2 | 1.390 (5) | C8—H8A | 0.9900 |
N1—C13 | 1.476 (5) | C8—H8B | 0.9900 |
N2—C1 | 1.342 (5) | C9—C10 | 1.534 (6) |
N2—N3 | 1.379 (5) | C9—H9A | 0.9900 |
N2—H2N | 0.8800 | C9—H9B | 0.9900 |
N3—C2 | 1.300 (5) | C10—C11 | 1.537 (6) |
C2—C3 | 1.504 (5) | C10—C12 | 1.538 (7) |
C3—C8 | 1.550 (5) | C10—H10 | 1.0000 |
C3—C9 | 1.551 (6) | C11—H11A | 0.9900 |
C3—C4 | 1.552 (5) | C11—H11B | 0.9900 |
C4—C5 | 1.525 (5) | C12—H12A | 0.9900 |
C4—H4A | 0.9900 | C12—H12B | 0.9900 |
C4—H4B | 0.9900 | C13—C14 | 1.506 (6) |
C5—C6 | 1.533 (6) | C13—H13A | 0.9900 |
C5—C11 | 1.539 (7) | C13—H13B | 0.9900 |
C5—H5 | 1.0000 | C14—C15 | 1.326 (6) |
C6—C7 | 1.534 (6) | C14—H14 | 0.9500 |
C6—H6A | 0.9900 | C15—H15A | 0.9500 |
C6—H6B | 0.9900 | C15—H15B | 0.9500 |
C7—C8 | 1.527 (6) | ||
C1—N1—C2 | 107.5 (3) | C7—C8—C3 | 110.3 (3) |
C1—N1—C13 | 121.1 (3) | C7—C8—H8A | 109.6 |
C2—N1—C13 | 131.0 (3) | C3—C8—H8A | 109.6 |
C1—N2—N3 | 112.9 (3) | C7—C8—H8B | 109.6 |
C1—N2—H2N | 123.6 | C3—C8—H8B | 109.6 |
N3—N2—H2N | 123.6 | H8A—C8—H8B | 108.1 |
C2—N3—N2 | 104.6 (3) | C10—C9—C3 | 110.0 (3) |
N2—C1—N1 | 104.2 (3) | C10—C9—H9A | 109.7 |
N2—C1—S1 | 128.1 (3) | C3—C9—H9A | 109.7 |
N1—C1—S1 | 127.7 (3) | C10—C9—H9B | 109.7 |
N3—C2—N1 | 110.8 (3) | C3—C9—H9B | 109.7 |
N3—C2—C3 | 122.6 (3) | H9A—C9—H9B | 108.2 |
N1—C2—C3 | 126.4 (3) | C9—C10—C11 | 109.1 (3) |
C2—C3—C8 | 108.2 (3) | C9—C10—C12 | 109.4 (4) |
C2—C3—C9 | 111.5 (3) | C11—C10—C12 | 110.1 (4) |
C8—C3—C9 | 108.1 (3) | C9—C10—H10 | 109.4 |
C2—C3—C4 | 111.4 (3) | C11—C10—H10 | 109.4 |
C8—C3—C4 | 107.5 (3) | C12—C10—H10 | 109.4 |
C9—C3—C4 | 110.1 (3) | C10—C11—C5 | 110.0 (4) |
C5—C4—C3 | 110.2 (3) | C10—C11—H11A | 109.7 |
C5—C4—H4A | 109.6 | C5—C11—H11A | 109.7 |
C3—C4—H4A | 109.6 | C10—C11—H11B | 109.7 |
C5—C4—H4B | 109.6 | C5—C11—H11B | 109.7 |
C3—C4—H4B | 109.6 | H11A—C11—H11B | 108.2 |
H4A—C4—H4B | 108.1 | C10—C12—C7 | 108.7 (4) |
C4—C5—C6 | 109.6 (3) | C10—C12—H12A | 110.0 |
C4—C5—C11 | 109.4 (3) | C7—C12—H12A | 110.0 |
C6—C5—C11 | 109.3 (4) | C10—C12—H12B | 110.0 |
C4—C5—H5 | 109.5 | C7—C12—H12B | 110.0 |
C6—C5—H5 | 109.5 | H12A—C12—H12B | 108.3 |
C11—C5—H5 | 109.5 | N1—C13—C14 | 111.4 (3) |
C5—C6—C7 | 109.4 (4) | N1—C13—H13A | 109.3 |
C5—C6—H6A | 109.8 | C14—C13—H13A | 109.3 |
C7—C6—H6A | 109.8 | N1—C13—H13B | 109.3 |
C5—C6—H6B | 109.8 | C14—C13—H13B | 109.3 |
C7—C6—H6B | 109.8 | H13A—C13—H13B | 108.0 |
H6A—C6—H6B | 108.2 | C15—C14—C13 | 123.7 (4) |
C8—C7—C6 | 109.7 (4) | C15—C14—H14 | 118.2 |
C8—C7—C12 | 110.0 (4) | C13—C14—H14 | 118.2 |
C6—C7—C12 | 109.6 (4) | C14—C15—H15A | 120.0 |
C8—C7—H7 | 109.2 | C14—C15—H15B | 120.0 |
C6—C7—H7 | 109.2 | H15A—C15—H15B | 120.0 |
C12—C7—H7 | 109.2 | ||
C1—N2—N3—C2 | 0.0 (4) | C11—C5—C6—C7 | 60.0 (5) |
N3—N2—C1—N1 | −0.1 (4) | C5—C6—C7—C8 | 59.5 (5) |
N3—N2—C1—S1 | 177.5 (3) | C5—C6—C7—C12 | −61.4 (5) |
C2—N1—C1—N2 | 0.2 (4) | C6—C7—C8—C3 | −60.4 (5) |
C13—N1—C1—N2 | −173.0 (3) | C12—C7—C8—C3 | 60.3 (5) |
C2—N1—C1—S1 | −177.5 (3) | C2—C3—C8—C7 | −179.9 (3) |
C13—N1—C1—S1 | 9.3 (6) | C9—C3—C8—C7 | −59.1 (4) |
N2—N3—C2—N1 | 0.1 (4) | C4—C3—C8—C7 | 59.7 (4) |
N2—N3—C2—C3 | −176.5 (3) | C2—C3—C9—C10 | 178.3 (3) |
C1—N1—C2—N3 | −0.2 (5) | C8—C3—C9—C10 | 59.6 (4) |
C13—N1—C2—N3 | 172.1 (4) | C4—C3—C9—C10 | −57.5 (4) |
C1—N1—C2—C3 | 176.2 (4) | C3—C9—C10—C11 | 59.2 (5) |
C13—N1—C2—C3 | −11.5 (7) | C3—C9—C10—C12 | −61.3 (5) |
N3—C2—C3—C8 | −1.5 (5) | C9—C10—C11—C5 | −61.2 (5) |
N1—C2—C3—C8 | −177.5 (4) | C12—C10—C11—C5 | 58.9 (4) |
N3—C2—C3—C9 | −120.2 (4) | C4—C5—C11—C10 | 61.1 (4) |
N1—C2—C3—C9 | 63.8 (5) | C6—C5—C11—C10 | −58.9 (4) |
N3—C2—C3—C4 | 116.4 (4) | C9—C10—C12—C7 | 60.6 (5) |
N1—C2—C3—C4 | −59.6 (5) | C11—C10—C12—C7 | −59.3 (4) |
C2—C3—C4—C5 | −178.4 (3) | C8—C7—C12—C10 | −60.2 (4) |
C8—C3—C4—C5 | −60.1 (4) | C6—C7—C12—C10 | 60.6 (4) |
C9—C3—C4—C5 | 57.4 (4) | C1—N1—C13—C14 | 77.1 (5) |
C3—C4—C5—C6 | 61.0 (5) | C2—N1—C13—C14 | −94.3 (5) |
C3—C4—C5—C11 | −58.8 (4) | N1—C13—C14—C15 | 126.8 (4) |
C4—C5—C6—C7 | −59.8 (5) |
Cg1 is the centroid of the C1/C2/N1/N2/N3 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2N···S1i | 0.88 | 2.43 | 3.296 (3) | 170 |
C5—H5···Cg1ii | 1.00 | 2.60 | 3.529 (6) | 155 |
C13—H13A···Cg1iii | 0.99 | 2.81 | 3.351 (5) | 115 |
Symmetry codes: (i) −x+1, −y+1, −z+1; (ii) x−1/2, −y+1/2, z−1/2; (iii) −x+3/2, y+1/2, −z+3/2. |
Experimental details
Crystal data | |
Chemical formula | C15H21N3S |
Mr | 275.41 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 100 |
a, b, c (Å) | 13.5833 (17), 8.6483 (6), 13.6973 (14) |
β (°) | 115.938 (14) |
V (Å3) | 1447.0 (3) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.22 |
Crystal size (mm) | 0.35 × 0.15 × 0.10 |
Data collection | |
Diffractometer | Agilent SuperNova Dual diffractometer with Atlas detector |
Absorption correction | Multi-scan (CrysAlis PRO; Agilent, 2011) |
Tmin, Tmax | 0.929, 0.979 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 10998, 3324, 2875 |
Rint | 0.077 |
(sin θ/λ)max (Å−1) | 0.652 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.081, 0.230, 1.17 |
No. of reflections | 3324 |
No. of parameters | 173 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.71, −0.66 |
Computer programs: CrysAlis PRO (Agilent, 2011), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 2006), publCIF (Westrip, 2010).
Cg1 is the centroid of the C1/C2/N1/N2/N3 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2N···S1i | 0.88 | 2.43 | 3.296 (3) | 170 |
C5—H5···Cg1ii | 1.00 | 2.60 | 3.529 (6) | 155 |
C13—H13A···Cg1iii | 0.99 | 2.81 | 3.351 (5) | 115 |
Symmetry codes: (i) −x+1, −y+1, −z+1; (ii) x−1/2, −y+1/2, z−1/2; (iii) −x+3/2, y+1/2, −z+3/2. |
Footnotes
‡Additional correspondence author, e-mail: elemam5@hotmail.com.
Acknowledgements
The financial support of the Deanship of Scientific Research and the Research Center of the College of Pharmacy, King Saud University, is greatly appreciated. We also thank the Ministry of Higher Education (Malaysia) for funding structural studies through the High-Impact Research Scheme (grant No. UM.C/HIR/MOHE/SC/12).
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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.
Derivatives of adamantane have long been known for their diverse biological activities including anti-viral activity against the influenza (Vernier et al., 1969) and HIV viruses (El-Emam et al., 2004). Moreover, adamantane derivatives were recently reported to exhibit marked anti-bacterial activity (Kadi et al., 2007, 2010). In an earlier publication, we reported the synthesis and potent anti-microbial and anti-inflammatory activities for a series of 5-(1-adamantyl)-4-substituted-4H-1,2,4-triazole-3-thiols and related derivatives, including the title compound, (I) (Al-Deeb et al., 2006). Herein, the crystal and molecular structure is described which was performed to determine the tautomeric form of (I).
The key result of the structure determination of (I) is the confirmation of the thione form of the molecule, Fig. 1. The 1,2,4-triazole ring is planar [r.m.s. deviation = 0.004 Å] and the S1 atom lies 0.060 (1) Å out of this plane. The C13 atom lies even further out of the plane, i.e. by 0.155 (4) Å in the opposite direction to the S1 atom. The prop-2-en-1-yl chain is almost perpendicular to the plane through the five-membered ring as seen in the value of the C1—N1—C13—C14 torsion angle of 77.1 (5)°. The terminal ethene bond is directed toward the adamantyl group.
In the crystal packing, centrosymmetric dimeric aggregates are formed by N—H···S hydrogen bonds via eight-membered {···HNCS}2 synthons. These are connected into a two-dimensional array parallel to (101) via C—H···π interactions, where the π-system is the triazole ring, Fig. 2 and Table 1. Layers stack without specific intermolecular interactions between them, Fig. 3.