organic compounds
4-({(E)-[2-(But-3-en-1-yl)-1-(prop-2-en-1-yl)-4-sulfanyl-1H-imidazol-5-yl]methylidene}amino)-3-phenyl-1H-1,2,4-triazole-5(4H)-thione
aDepartment of Advanced Technology Fusion, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 143 701, Republic of Korea
*Correspondence e-mail: sampath@konkuk.ac.kr, sams76@gmail.com
In the title compound, C19H20N6S2, the dihedral angle between the phenyl and triazole rings is 24.1 (2)° while the dihedral angles between the imidazole ring and the triazole and phenyl rings are 39.9 (2) and 55.3 (2)°, respectively. The is stabilized by intermolecular N—H⋯N hydrogen bonds which form chains along [10].
Related literature
For biological applications of Schiff base compounds, see: Liang (2003); Bacci et al. (2005). For the biological activity of triazoles and their derivatives, see: Amir et al. (2008); Sztanke et al. (2008); Padmavathi et al. (2008); Thenmozhi et al. (2010). Pharmacological compounds having triazole moieties appear to be very effective aromatese inhibitors for the prevention of breast cancer, see: Ünver et al. (2010).
Experimental
Crystal data
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Data collection
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Refinement
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Data collection: APEX2 (Bruker, 2004); cell SAINT (Bruker, 2004); 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 (Farrugia, 1997); software used to prepare material for publication: PLATON (Spek, 2009).
Supporting information
10.1107/S1600536811039833/kj2187sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536811039833/kj2187Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536811039833/kj2187Isup3.cml
The title compound was synthesized by refluxing 4-amino-5-phenyl-2,4-dihydro-3H-1,2,4-triazole-3-thione (0.01 mmol) and 2-(but-3-en-1-yl)-1-(prop-2-en-1-yl)-4-sulfanyl-1H-imidazole-5- carbaldehyde (0.01 mmol) in ethanol (50 ml) with a few drops of H2SO4 for 3 h on a water bath. The reaction progress was monitored by TLC. The resulting precipitate was filtered off, washed with cold ethanol, dried and purified to give the target product as a colorless solid in 74% yield. The resulting Schiff base compound was seperated out and crystallized in ethanol.
H atoms were positioned geometrically, taking H-bond formation potential into account where necessary, and refined using a riding model with C—H = 0.93 Å for aromatic H, 0.97 Å for methylene, for aromatic N—H = 0.86 Å and for S—H = 1.2 Å. The Uiso parameters for H atoms were constrained to be 1.5Ueq of the
for the thiol H atom and 1.2Ueq of the for the remaining H atoms.Data collection: SMART (Bruker, 2004); cell
SAINT (Bruker, 2004); data reduction: SAINT (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: PLATON (Spek, 2009).C19H20N6S2 | F(000) = 832 |
Mr = 396.53 | Dx = 1.276 Mg m−3 |
Monoclinic, Cc | Mo Kα radiation, λ = 0.71073 Å |
a = 13.384 (3) Å | Cell parameters from 7754 reflections |
b = 13.892 (3) Å | θ = 2.1–27.0° |
c = 11.349 (2) Å | µ = 0.27 mm−1 |
β = 101.953 (3)° | T = 293 K |
V = 2064.5 (7) Å3 | Prism, pale yellow |
Z = 4 | 0.28 × 0.25 × 0.23 mm |
Bruker SMART APEX CCD area-detector diffractometer | 3391 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.017 |
Graphite monochromator | θmax = 27.0°, θmin = 2.1° |
ω scans | h = −16→16 |
7754 measured reflections | k = −17→17 |
3788 independent reflections | l = −14→13 |
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)] = 0.053 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.139 | H-atom parameters constrained |
S = 1.07 | w = 1/[σ2(Fo2) + (0.0788P)2 + 0.8006P] where P = (Fo2 + 2Fc2)/3 |
3788 reflections | (Δ/σ)max = 0.001 |
244 parameters | Δρmax = 0.33 e Å−3 |
2 restraints | Δρmin = −0.21 e Å−3 |
C19H20N6S2 | V = 2064.5 (7) Å3 |
Mr = 396.53 | Z = 4 |
Monoclinic, Cc | Mo Kα radiation |
a = 13.384 (3) Å | µ = 0.27 mm−1 |
b = 13.892 (3) Å | T = 293 K |
c = 11.349 (2) Å | 0.28 × 0.25 × 0.23 mm |
β = 101.953 (3)° |
Bruker SMART APEX CCD area-detector diffractometer | 3391 reflections with I > 2σ(I) |
7754 measured reflections | Rint = 0.017 |
3788 independent reflections |
R[F2 > 2σ(F2)] = 0.053 | 2 restraints |
wR(F2) = 0.139 | H-atom parameters constrained |
S = 1.07 | Δρmax = 0.33 e Å−3 |
3788 reflections | Δρmin = −0.21 e Å−3 |
244 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 | ||
S1 | 0.62454 (8) | 0.22573 (8) | −0.09079 (10) | 0.0795 (3) | |
H1 | 0.6713 | 0.1935 | −0.1613 | 0.119* | |
S2 | 0.50671 (9) | 0.18382 (7) | 0.24665 (11) | 0.0776 (3) | |
N1 | 0.4682 (2) | 0.38001 (19) | 0.2489 (3) | 0.0520 (6) | |
C2 | 0.4505 (3) | 0.2855 (3) | 0.2779 (3) | 0.0607 (8) | |
N3 | 0.3797 (2) | 0.2949 (2) | 0.3446 (3) | 0.0677 (8) | |
H3 | 0.3536 | 0.2465 | 0.3748 | 0.081* | |
N4 | 0.3523 (3) | 0.3875 (2) | 0.3605 (3) | 0.0695 (8) | |
C5 | 0.4076 (3) | 0.4390 (3) | 0.3039 (3) | 0.0565 (8) | |
C6 | 0.3977 (3) | 0.5438 (3) | 0.2943 (3) | 0.0607 (8) | |
C7 | 0.4199 (3) | 0.5949 (3) | 0.1981 (4) | 0.0718 (10) | |
H7 | 0.4487 | 0.5641 | 0.1405 | 0.086* | |
C8 | 0.3985 (4) | 0.6924 (3) | 0.1887 (5) | 0.0930 (14) | |
H8 | 0.4135 | 0.7268 | 0.1242 | 0.112* | |
C9 | 0.3562 (4) | 0.7392 (4) | 0.2712 (6) | 0.0979 (16) | |
H9 | 0.3405 | 0.8043 | 0.2621 | 0.117* | |
C10 | 0.3367 (5) | 0.6889 (4) | 0.3690 (6) | 0.1026 (16) | |
H10 | 0.3098 | 0.7205 | 0.4276 | 0.123* | |
C11 | 0.3571 (4) | 0.5923 (3) | 0.3796 (5) | 0.0864 (13) | |
H11 | 0.3434 | 0.5588 | 0.4454 | 0.104* | |
N12 | 0.5512 (2) | 0.4157 (2) | 0.2041 (2) | 0.0534 (6) | |
C13 | 0.5707 (2) | 0.3656 (2) | 0.1163 (3) | 0.0510 (7) | |
H13 | 0.5263 | 0.3157 | 0.0863 | 0.061* | |
C14 | 0.6567 (2) | 0.3821 (2) | 0.0621 (3) | 0.0498 (7) | |
C15 | 0.6859 (3) | 0.3256 (2) | −0.0233 (3) | 0.0554 (8) | |
N16 | 0.7739 (2) | 0.3557 (2) | −0.0521 (3) | 0.0586 (7) | |
C17 | 0.8009 (3) | 0.4324 (2) | 0.0163 (3) | 0.0576 (8) | |
N18 | 0.7337 (2) | 0.45065 (18) | 0.0878 (2) | 0.0529 (6) | |
C19 | 0.7387 (3) | 0.5317 (3) | 0.1724 (3) | 0.0615 (8) | |
H19A | 0.7062 | 0.5130 | 0.2378 | 0.074* | |
H19B | 0.8098 | 0.5459 | 0.2067 | 0.074* | |
C20 | 0.6890 (4) | 0.6192 (3) | 0.1151 (5) | 0.0787 (12) | |
H20 | 0.6881 | 0.6715 | 0.1659 | 0.094* | |
C21 | 0.6481 (5) | 0.6321 (4) | 0.0080 (6) | 0.0983 (16) | |
H21A | 0.6465 | 0.5826 | −0.0475 | 0.118* | |
H21B | 0.6191 | 0.6915 | −0.0170 | 0.118* | |
C22 | 0.8959 (4) | 0.4875 (3) | 0.0161 (5) | 0.0925 (16) | |
H22A | 0.9024 | 0.4973 | −0.0666 | 0.111* | |
H22B | 0.8902 | 0.5503 | 0.0514 | 0.111* | |
C23 | 0.9883 (4) | 0.4404 (4) | 0.0821 (9) | 0.152 (3) | |
H23B | 0.9879 | 0.3736 | 0.0571 | 0.182* | |
H23A | 0.9880 | 0.4415 | 0.1675 | 0.182* | |
C24 | 1.0858 (6) | 0.4886 (5) | 0.0613 (15) | 0.220 (6) | |
H24 | 1.0844 | 0.5505 | 0.0298 | 0.264* | |
C25 | 1.1675 (6) | 0.4425 (8) | 0.0880 (11) | 0.199 (5) | |
H25A | 1.1677 | 0.3807 | 0.1195 | 0.239* | |
H25B | 1.2281 | 0.4700 | 0.0764 | 0.239* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0824 (7) | 0.0741 (6) | 0.0920 (7) | −0.0194 (5) | 0.0409 (6) | −0.0316 (5) |
S2 | 0.0906 (7) | 0.0572 (5) | 0.0970 (7) | −0.0004 (5) | 0.0467 (6) | −0.0015 (5) |
N1 | 0.0515 (14) | 0.0552 (15) | 0.0571 (15) | −0.0019 (11) | 0.0294 (12) | 0.0031 (12) |
C2 | 0.0590 (19) | 0.068 (2) | 0.061 (2) | −0.0067 (16) | 0.0263 (16) | 0.0024 (15) |
N3 | 0.0701 (18) | 0.0648 (18) | 0.081 (2) | −0.0029 (14) | 0.0454 (16) | 0.0120 (15) |
N4 | 0.0696 (18) | 0.0688 (18) | 0.084 (2) | 0.0036 (15) | 0.0483 (17) | 0.0082 (16) |
C5 | 0.0526 (17) | 0.070 (2) | 0.0534 (18) | 0.0031 (15) | 0.0248 (14) | 0.0057 (15) |
C6 | 0.0495 (18) | 0.0632 (19) | 0.075 (2) | 0.0059 (15) | 0.0267 (16) | 0.0011 (17) |
C7 | 0.081 (2) | 0.067 (2) | 0.074 (2) | 0.0027 (19) | 0.031 (2) | 0.0065 (18) |
C8 | 0.111 (4) | 0.076 (3) | 0.095 (3) | 0.005 (3) | 0.027 (3) | 0.019 (2) |
C9 | 0.102 (4) | 0.066 (3) | 0.125 (4) | 0.027 (2) | 0.022 (3) | 0.005 (3) |
C10 | 0.112 (4) | 0.082 (3) | 0.127 (4) | 0.024 (3) | 0.057 (3) | −0.007 (3) |
C11 | 0.092 (3) | 0.087 (3) | 0.095 (3) | 0.023 (2) | 0.053 (3) | 0.002 (2) |
N12 | 0.0522 (14) | 0.0620 (15) | 0.0540 (15) | −0.0017 (12) | 0.0295 (12) | 0.0045 (12) |
C13 | 0.0480 (16) | 0.0578 (18) | 0.0504 (18) | −0.0032 (13) | 0.0178 (14) | 0.0021 (14) |
C14 | 0.0515 (17) | 0.0523 (16) | 0.0499 (18) | 0.0035 (13) | 0.0208 (14) | 0.0019 (13) |
C15 | 0.0579 (18) | 0.0545 (18) | 0.060 (2) | 0.0018 (14) | 0.0274 (15) | −0.0023 (14) |
N16 | 0.0628 (16) | 0.0585 (16) | 0.0652 (18) | −0.0012 (13) | 0.0380 (14) | −0.0036 (13) |
C17 | 0.063 (2) | 0.0534 (17) | 0.067 (2) | −0.0015 (15) | 0.0368 (17) | 0.0028 (15) |
N18 | 0.0605 (15) | 0.0483 (13) | 0.0578 (15) | −0.0009 (12) | 0.0303 (12) | 0.0003 (12) |
C19 | 0.066 (2) | 0.0562 (18) | 0.067 (2) | −0.0088 (15) | 0.0261 (17) | −0.0108 (15) |
C20 | 0.082 (3) | 0.068 (2) | 0.089 (3) | −0.002 (2) | 0.024 (3) | −0.016 (2) |
C21 | 0.108 (4) | 0.073 (3) | 0.106 (4) | 0.014 (3) | 0.006 (3) | −0.002 (3) |
C22 | 0.095 (3) | 0.082 (3) | 0.125 (4) | −0.032 (3) | 0.079 (3) | −0.029 (3) |
C23 | 0.059 (3) | 0.084 (3) | 0.322 (11) | −0.019 (2) | 0.063 (4) | −0.027 (5) |
C24 | 0.093 (5) | 0.090 (4) | 0.514 (19) | −0.031 (4) | 0.152 (8) | −0.058 (7) |
C25 | 0.080 (4) | 0.223 (10) | 0.314 (14) | −0.025 (5) | 0.087 (6) | −0.018 (10) |
S1—C15 | 1.711 (4) | C14—C15 | 1.365 (4) |
S1—H1 | 1.2000 | C14—N18 | 1.389 (4) |
S2—C2 | 1.673 (4) | C15—N16 | 1.352 (4) |
N1—C2 | 1.385 (5) | N16—C17 | 1.324 (5) |
N1—C5 | 1.389 (4) | C17—N18 | 1.355 (4) |
N1—N12 | 1.405 (4) | C17—C22 | 1.485 (5) |
C2—N3 | 1.337 (5) | N18—C19 | 1.472 (4) |
N3—N4 | 1.359 (4) | C19—C20 | 1.471 (6) |
N3—H3 | 0.8600 | C19—H19A | 0.9700 |
N4—C5 | 1.292 (4) | C19—H19B | 0.9700 |
C5—C6 | 1.463 (5) | C20—C21 | 1.239 (7) |
C6—C11 | 1.380 (5) | C20—H20 | 0.9300 |
C6—C7 | 1.386 (5) | C21—H21A | 0.9300 |
C7—C8 | 1.384 (6) | C21—H21B | 0.9300 |
C7—H7 | 0.9300 | C22—C23 | 1.461 (9) |
C8—C9 | 1.356 (8) | C22—H22A | 0.9700 |
C8—H8 | 0.9300 | C22—H22B | 0.9700 |
C9—C10 | 1.381 (8) | C23—C24 | 1.529 (8) |
C9—H9 | 0.9300 | C23—H23B | 0.9700 |
C10—C11 | 1.370 (7) | C23—H23A | 0.9700 |
C10—H10 | 0.9300 | C24—C25 | 1.250 (13) |
C11—H11 | 0.9300 | C24—H24 | 0.9300 |
N12—C13 | 1.285 (4) | C25—H25A | 0.9300 |
C13—C14 | 1.432 (4) | C25—H25B | 0.9300 |
C13—H13 | 0.9300 | ||
C15—S1—H1 | 109.5 | N16—C15—S1 | 120.2 (2) |
C2—N1—C5 | 107.9 (3) | C14—C15—S1 | 127.1 (3) |
C2—N1—N12 | 127.4 (3) | C17—N16—C15 | 104.6 (3) |
C5—N1—N12 | 122.3 (3) | N16—C17—N18 | 111.6 (3) |
N3—C2—N1 | 102.6 (3) | N16—C17—C22 | 123.0 (3) |
N3—C2—S2 | 127.2 (3) | N18—C17—C22 | 125.4 (3) |
N1—C2—S2 | 130.1 (3) | C17—N18—C14 | 107.5 (3) |
C2—N3—N4 | 114.2 (3) | C17—N18—C19 | 126.0 (3) |
C2—N3—H3 | 122.9 | C14—N18—C19 | 126.4 (3) |
N4—N3—H3 | 122.9 | C20—C19—N18 | 112.8 (3) |
C5—N4—N3 | 105.1 (3) | C20—C19—H19A | 109.0 |
N4—C5—N1 | 110.2 (3) | N18—C19—H19A | 109.0 |
N4—C5—C6 | 122.4 (3) | C20—C19—H19B | 109.0 |
N1—C5—C6 | 127.2 (3) | N18—C19—H19B | 109.0 |
C11—C6—C7 | 118.8 (4) | H19A—C19—H19B | 107.8 |
C11—C6—C5 | 118.4 (4) | C21—C20—C19 | 128.4 (4) |
C7—C6—C5 | 122.6 (3) | C21—C20—H20 | 115.8 |
C8—C7—C6 | 119.2 (4) | C19—C20—H20 | 115.8 |
C8—C7—H7 | 120.4 | C20—C21—H21A | 120.0 |
C6—C7—H7 | 120.4 | C20—C21—H21B | 120.0 |
C9—C8—C7 | 121.6 (5) | H21A—C21—H21B | 120.0 |
C9—C8—H8 | 119.2 | C23—C22—C17 | 113.7 (4) |
C7—C8—H8 | 119.2 | C23—C22—H22A | 108.8 |
C8—C9—C10 | 119.2 (4) | C17—C22—H22A | 108.8 |
C8—C9—H9 | 120.4 | C23—C22—H22B | 108.8 |
C10—C9—H9 | 120.4 | C17—C22—H22B | 108.8 |
C11—C10—C9 | 119.9 (5) | H22A—C22—H22B | 107.7 |
C11—C10—H10 | 120.1 | C22—C23—C24 | 112.6 (7) |
C9—C10—H10 | 120.1 | C22—C23—H23B | 109.1 |
C10—C11—C6 | 121.2 (5) | C24—C23—H23B | 109.1 |
C10—C11—H11 | 119.4 | C22—C23—H23A | 109.1 |
C6—C11—H11 | 119.4 | C24—C23—H23A | 109.1 |
C13—N12—N1 | 113.1 (3) | H23B—C23—H23A | 107.8 |
N12—C13—C14 | 123.8 (3) | C25—C24—C23 | 118.0 (9) |
N12—C13—H13 | 118.1 | C25—C24—H24 | 121.0 |
N14—C13—H13 | 118.1 | C23—C24—H24 | 121.0 |
C15—C14—N18 | 103.6 (3) | C24—C25—H25A | 120.0 |
C15—C14—C13 | 125.9 (3) | C24—C25—H25B | 120.0 |
N18—C14—C13 | 130.3 (3) | H25A—C25—H25B | 120.0 |
N16—C15—C14 | 112.7 (3) | ||
C5—N1—C2—N3 | 1.5 (4) | N1—N12—C13—C14 | −174.4 (3) |
N12—N1—C2—N3 | 164.0 (3) | N12—C13—C14—C15 | 173.5 (3) |
C5—N1—C2—S2 | −175.1 (3) | N12—C13—C14—N18 | −0.4 (5) |
N12—N1—C2—S2 | −12.6 (6) | N18—C14—C15—N16 | −0.8 (4) |
N1—C2—N3—N4 | −0.5 (4) | C13—C14—C15—N16 | −176.0 (3) |
S2—C2—N3—N4 | 176.2 (3) | N18—C14—C15—S1 | 178.4 (3) |
C2—N3—N4—C5 | −0.7 (4) | C13—C14—C15—S1 | 3.3 (5) |
N3—N4—C5—N1 | 1.6 (4) | C14—C15—N16—C17 | 0.1 (4) |
N3—N4—C5—C6 | 177.0 (3) | S1—C15—N16—C17 | −179.2 (3) |
C2—N1—C5—N4 | −2.0 (4) | C15—N16—C17—N18 | 0.7 (4) |
N12—N1—C5—N4 | −165.6 (3) | C15—N16—C17—C22 | 178.4 (4) |
C2—N1—C5—C6 | −177.2 (4) | N16—C17—N18—C14 | −1.3 (4) |
N12—N1—C5—C6 | 19.2 (5) | C22—C17—N18—C14 | −178.8 (4) |
N4—C5—C6—C11 | 23.2 (6) | N16—C17—N18—C19 | −178.2 (3) |
N1—C5—C6—C11 | −162.2 (4) | C22—C17—N18—C19 | 4.2 (6) |
N4—C5—C6—C7 | −151.5 (4) | C15—C14—N18—C17 | 1.2 (3) |
N1—C5—C6—C7 | 23.0 (6) | C13—C14—N18—C17 | 176.1 (3) |
C11—C6—C7—C8 | −1.5 (6) | C15—C14—N18—C19 | 178.1 (3) |
C5—C6—C7—C8 | 173.2 (4) | C13—C14—N18—C19 | −7.0 (5) |
C6—C7—C8—C9 | −0.1 (8) | C17—N18—C19—C20 | 86.8 (4) |
C7—C8—C9—C10 | 1.9 (9) | C14—N18—C19—C20 | −89.6 (4) |
C8—C9—C10—C11 | −2.1 (9) | N18—C19—C20—C21 | −2.4 (7) |
C9—C10—C11—C6 | 0.4 (9) | N16—C17—C22—C23 | −76.5 (6) |
C7—C6—C11—C10 | 1.4 (7) | N18—C17—C22—C23 | 100.8 (5) |
C5—C6—C11—C10 | −173.5 (5) | C17—C22—C23—C24 | 169.4 (7) |
C2—N1—N12—C13 | 47.3 (4) | C22—C23—C24—C25 | −162.9 (12) |
C5—N1—N12—C13 | −152.4 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H3···N16i | 0.86 | 2.05 | 2.907 (5) | 172 |
Symmetry code: (i) x−1/2, −y+1/2, z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C19H20N6S2 |
Mr | 396.53 |
Crystal system, space group | Monoclinic, Cc |
Temperature (K) | 293 |
a, b, c (Å) | 13.384 (3), 13.892 (3), 11.349 (2) |
β (°) | 101.953 (3) |
V (Å3) | 2064.5 (7) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.27 |
Crystal size (mm) | 0.28 × 0.25 × 0.23 |
Data collection | |
Diffractometer | Bruker SMART APEX CCD area-detector diffractometer |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 7754, 3788, 3391 |
Rint | 0.017 |
(sin θ/λ)max (Å−1) | 0.639 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.053, 0.139, 1.07 |
No. of reflections | 3788 |
No. of parameters | 244 |
No. of restraints | 2 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.33, −0.21 |
Computer programs: SMART (Bruker, 2004), SAINT (Bruker, 2004), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997), PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H3···N16i | 0.86 | 2.05 | 2.907 (5) | 172 |
Symmetry code: (i) x−1/2, −y+1/2, z+1/2. |
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.
Synthesis and structural investigation of Schiff base compounds have been given attention due to their interesting structural features and potential biological applications (Liang, 2003; Bacci et al., 2005). The biological importance of imidazoles and triazoles has stimulated much work on these heterocycles. Triazole compounds and their derivatives have many applications in medicine and were reported to exhibit various pharmacological activities such as antimicrobial, analgesic, anti-inflammatory, anticancer and antioxidant properties (Amir et al., 2008; Sztanke et al., 2008; Padmavathi et al., 2008; Thenmozhi et al., 2010). The 1,2,4-triazole group interacts strongly with heme iron and aromatic substituents on the triazoles are very effective for interacting with the active site of aromatase. Furthermore, it was reported that pharmacological compounds having triazole moieties such as Vorozole, Anastrozole and Letrozole appear to be very effective aromatese inhibitors for preventing breast cancer (Ünver et al., 2010). In view of these important applications of imidazolines, here we report the crystal structure of the title compound (Fig. 1).
The title compound contains imidazole and 1,2,4-triazole rings connected by an imine group. A phenyl ring is substituted at position 5 of the triazole ring and the dihedral angle between these rings is 24.1 (2)°. The imidazole and triazole groups are substituted on the imine group (N12—C13) in the E-configuration [N1—N12—C13—C14 = -174.4 (3)°]. The triazole ring is not co-planar with the imidazole ring and this may be due to the substitution of the phenyl ring on the triazole ring. The dihedral angles between the imidazole ring and the triazole and phenyl rings are 39.9 (2)° and 55.3 (2)°, respectively. The imidazole ring is substituted by bulky groups (3-butene, 2-propene) as well as an imine and a thiol group, which gives strain on the ring. The 3-butene and imine substituents show an extended zigzag confirmation with respect to the imidazole ring.
The packing diagram of the title compound viewed down the a axis is shown in Fig. 2. The crystal packing displays intermolecular N—H···N hydrogen bonds (Table 1), which join the molecules into chains in the [1 0 -1] direction.