organic compounds
4-{[(E)-(3-Phenyl-1H-pyrazol-4-yl)methylidene]amino}-1H-1,2,4-triazole-5(4H)-thione
aX-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia, and bDepartment of Chemistry, National Institute of Technology, Karnataka, Surathkal, Mangalore 575 025, India
*Correspondence e-mail: hkfun@usm.my
In the title compound, C12H10N6S, a weak intramolecular C—H⋯S hydrogen bond stabilizes the molecular conformation. The pyrazole and triazole rings form a dihedral angle of 17.82 (8)°. The molecule adopts an E configuration with respect to the central C=N double bond. In the crystal, intermolecular N—H⋯N and N—H⋯S hydrogen bonds link molecules into chains propagating in [20].
Related literature
For applications of et al. (2005); Bekircan et al. (2006); Singh & Dash (1988). For a related structure, see: Fun et al. (2010).
see: KahveciExperimental
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
10.1107/S1600536811024834/cv5118sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536811024834/cv5118Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536811024834/cv5118Isup3.cml
An equimolar mixture of 4-amino-4H-1,2,4-triazole-3-thiol (0.116 g, 0.001 mol) and 3-phenyl-1H-pyrazole-4-carbaldehyde (0.172 g, 0.001) in ethanol were refluxed for 7–8 hours in presence of catalytic amount of sulfuric acid. The precipitated solid was filtered, washed with ethanol and recrystallised from ethanol-dioxane mixture. Yield: 0.214 g, 79.25%. M.p- 526–528 K.
Atoms H1N2 and H1N6 were located from a difference Fourier maps and isotropically refined. The remaining H atoms were positioned geometrically [C–H = 0.93 Å] and were refined using a riding model, with Uiso(H) = 1.2 Ueq(C).
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 (I) showing 30% probability displacement ellipsoids and the atom-numbering scheme. Dashed line denotes weak intramolecular hydrogen bond. |
C12H10N6S | F(000) = 560 |
Mr = 270.32 | Dx = 1.436 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 4488 reflections |
a = 4.1180 (4) Å | θ = 2.7–32.1° |
b = 17.9237 (16) Å | µ = 0.25 mm−1 |
c = 17.0787 (15) Å | T = 296 K |
β = 97.352 (3)° | Block, colourless |
V = 1250.2 (2) Å3 | 0.55 × 0.26 × 0.19 mm |
Z = 4 |
Bruker APEXII DUO CCD area-detector diffractometer | 4361 independent reflections |
Radiation source: fine-focus sealed tube | 3204 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.022 |
ϕ and ω scans | θmax = 32.2°, θmin = 1.7° |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | h = −5→6 |
Tmin = 0.872, Tmax = 0.954 | k = −23→26 |
14262 measured reflections | l = −24→25 |
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)] = 0.040 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.120 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.03 | w = 1/[σ2(Fo2) + (0.0574P)2 + 0.2417P] where P = (Fo2 + 2Fc2)/3 |
4361 reflections | (Δ/σ)max = 0.001 |
180 parameters | Δρmax = 0.29 e Å−3 |
0 restraints | Δρmin = −0.28 e Å−3 |
C12H10N6S | V = 1250.2 (2) Å3 |
Mr = 270.32 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 4.1180 (4) Å | µ = 0.25 mm−1 |
b = 17.9237 (16) Å | T = 296 K |
c = 17.0787 (15) Å | 0.55 × 0.26 × 0.19 mm |
β = 97.352 (3)° |
Bruker APEXII DUO CCD area-detector diffractometer | 4361 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | 3204 reflections with I > 2σ(I) |
Tmin = 0.872, Tmax = 0.954 | Rint = 0.022 |
14262 measured reflections |
R[F2 > 2σ(F2)] = 0.040 | 0 restraints |
wR(F2) = 0.120 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.03 | Δρmax = 0.29 e Å−3 |
4361 reflections | Δρmin = −0.28 e Å−3 |
180 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 | 0.40558 (10) | 0.78578 (2) | 0.54047 (2) | 0.04665 (12) | |
N1 | 0.9965 (3) | 0.79730 (6) | 0.20882 (6) | 0.0407 (3) | |
N2 | 1.0317 (3) | 0.72254 (7) | 0.20392 (7) | 0.0420 (3) | |
N3 | 0.5720 (3) | 0.66043 (6) | 0.39821 (6) | 0.0384 (2) | |
N4 | 0.3925 (3) | 0.64999 (5) | 0.46129 (6) | 0.0348 (2) | |
N5 | 0.1337 (4) | 0.57751 (7) | 0.53767 (7) | 0.0488 (3) | |
N6 | 0.1665 (3) | 0.64885 (6) | 0.56639 (7) | 0.0413 (3) | |
C1 | 0.6630 (4) | 0.93695 (8) | 0.23797 (9) | 0.0472 (3) | |
H1A | 0.6471 | 0.9232 | 0.1851 | 0.057* | |
C2 | 0.5789 (5) | 1.00854 (9) | 0.25766 (11) | 0.0598 (4) | |
H2A | 0.5067 | 1.0426 | 0.2181 | 0.072* | |
C3 | 0.6017 (5) | 1.02944 (9) | 0.33542 (12) | 0.0641 (5) | |
H3A | 0.5426 | 1.0774 | 0.3487 | 0.077* | |
C4 | 0.7125 (5) | 0.97907 (10) | 0.39391 (11) | 0.0629 (5) | |
H4A | 0.7289 | 0.9935 | 0.4466 | 0.075* | |
C5 | 0.7998 (4) | 0.90706 (9) | 0.37484 (9) | 0.0491 (3) | |
H5A | 0.8769 | 0.8736 | 0.4145 | 0.059* | |
C6 | 0.7714 (3) | 0.88523 (7) | 0.29628 (7) | 0.0370 (3) | |
C7 | 0.8527 (3) | 0.80877 (7) | 0.27359 (7) | 0.0341 (2) | |
C8 | 0.9156 (3) | 0.68630 (7) | 0.26224 (8) | 0.0388 (3) | |
H8A | 0.9153 | 0.6349 | 0.2698 | 0.047* | |
C9 | 0.7949 (3) | 0.73971 (7) | 0.30963 (7) | 0.0337 (2) | |
C10 | 0.6185 (3) | 0.72707 (7) | 0.37639 (7) | 0.0358 (2) | |
H10A | 0.5400 | 0.7671 | 0.4030 | 0.043* | |
C11 | 0.2728 (4) | 0.58040 (7) | 0.47418 (8) | 0.0450 (3) | |
H11A | 0.2897 | 0.5399 | 0.4410 | 0.054* | |
C12 | 0.3230 (3) | 0.69554 (7) | 0.52237 (7) | 0.0335 (2) | |
H1N2 | 1.114 (5) | 0.7046 (11) | 0.1654 (12) | 0.064 (6)* | |
H1N6 | 0.095 (5) | 0.6601 (12) | 0.6124 (12) | 0.067 (6)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0665 (2) | 0.03563 (18) | 0.04225 (19) | −0.01109 (15) | 0.02386 (16) | −0.00666 (13) |
N1 | 0.0537 (7) | 0.0369 (6) | 0.0350 (5) | −0.0016 (4) | 0.0193 (5) | 0.0000 (4) |
N2 | 0.0546 (7) | 0.0397 (6) | 0.0357 (5) | 0.0009 (5) | 0.0210 (5) | −0.0030 (4) |
N3 | 0.0492 (6) | 0.0373 (5) | 0.0323 (5) | 0.0024 (4) | 0.0192 (4) | 0.0020 (4) |
N4 | 0.0459 (6) | 0.0294 (5) | 0.0322 (5) | 0.0016 (4) | 0.0167 (4) | 0.0020 (4) |
N5 | 0.0741 (8) | 0.0330 (6) | 0.0443 (6) | −0.0067 (5) | 0.0264 (6) | −0.0002 (4) |
N6 | 0.0590 (7) | 0.0339 (5) | 0.0354 (5) | −0.0037 (5) | 0.0225 (5) | −0.0012 (4) |
C1 | 0.0609 (9) | 0.0393 (7) | 0.0429 (7) | 0.0019 (6) | 0.0128 (6) | 0.0037 (5) |
C2 | 0.0743 (11) | 0.0391 (8) | 0.0677 (10) | 0.0064 (7) | 0.0150 (9) | 0.0070 (7) |
C3 | 0.0760 (12) | 0.0395 (8) | 0.0797 (12) | 0.0054 (8) | 0.0213 (9) | −0.0107 (8) |
C4 | 0.0801 (12) | 0.0566 (10) | 0.0543 (9) | −0.0021 (9) | 0.0172 (8) | −0.0203 (8) |
C5 | 0.0625 (9) | 0.0468 (8) | 0.0391 (7) | 0.0006 (7) | 0.0110 (6) | −0.0035 (6) |
C6 | 0.0414 (6) | 0.0348 (6) | 0.0368 (6) | −0.0027 (5) | 0.0134 (5) | −0.0009 (5) |
C7 | 0.0393 (6) | 0.0353 (6) | 0.0294 (5) | −0.0010 (5) | 0.0113 (4) | 0.0006 (4) |
C8 | 0.0462 (7) | 0.0358 (6) | 0.0366 (6) | −0.0001 (5) | 0.0140 (5) | 0.0002 (5) |
C9 | 0.0375 (6) | 0.0348 (6) | 0.0306 (5) | 0.0003 (4) | 0.0115 (4) | 0.0012 (4) |
C10 | 0.0411 (6) | 0.0366 (6) | 0.0321 (5) | 0.0030 (5) | 0.0139 (5) | 0.0021 (4) |
C11 | 0.0695 (9) | 0.0288 (6) | 0.0409 (6) | −0.0015 (6) | 0.0231 (6) | −0.0010 (5) |
C12 | 0.0381 (6) | 0.0336 (5) | 0.0307 (5) | 0.0010 (4) | 0.0121 (4) | 0.0003 (4) |
S1—C12 | 1.6735 (13) | C2—C3 | 1.372 (3) |
N1—C7 | 1.3358 (15) | C2—H2A | 0.9300 |
N1—N2 | 1.3516 (16) | C3—C4 | 1.380 (3) |
N2—C8 | 1.3283 (17) | C3—H3A | 0.9300 |
N2—H1N2 | 0.84 (2) | C4—C5 | 1.390 (2) |
N3—C10 | 1.2731 (17) | C4—H4A | 0.9300 |
N3—N4 | 1.3950 (14) | C5—C6 | 1.3880 (19) |
N4—C11 | 1.3693 (16) | C5—H5A | 0.9300 |
N4—C12 | 1.3830 (15) | C6—C7 | 1.4744 (17) |
N5—C11 | 1.2905 (18) | C7—C9 | 1.4160 (17) |
N5—N6 | 1.3700 (16) | C8—C9 | 1.3862 (17) |
N6—C12 | 1.3433 (16) | C8—H8A | 0.9300 |
N6—H1N6 | 0.90 (2) | C9—C10 | 1.4460 (16) |
C1—C2 | 1.382 (2) | C10—H10A | 0.9300 |
C1—C6 | 1.3916 (19) | C11—H11A | 0.9300 |
C1—H1A | 0.9300 | ||
C7—N1—N2 | 105.45 (10) | C6—C5—C4 | 119.74 (15) |
C8—N2—N1 | 112.74 (11) | C6—C5—H5A | 120.1 |
C8—N2—H1N2 | 128.2 (13) | C4—C5—H5A | 120.1 |
N1—N2—H1N2 | 119.0 (13) | C5—C6—C1 | 118.92 (13) |
C10—N3—N4 | 117.80 (11) | C5—C6—C7 | 121.48 (12) |
C11—N4—C12 | 107.64 (10) | C1—C6—C7 | 119.60 (12) |
C11—N4—N3 | 118.92 (10) | N1—C7—C9 | 110.02 (11) |
C12—N4—N3 | 133.20 (10) | N1—C7—C6 | 120.03 (11) |
C11—N5—N6 | 103.26 (11) | C9—C7—C6 | 129.93 (11) |
C12—N6—N5 | 114.42 (11) | N2—C8—C9 | 106.89 (11) |
C12—N6—H1N6 | 125.9 (14) | N2—C8—H8A | 126.6 |
N5—N6—H1N6 | 119.6 (14) | C9—C8—H8A | 126.6 |
C2—C1—C6 | 120.79 (15) | C8—C9—C7 | 104.90 (11) |
C2—C1—H1A | 119.6 | C8—C9—C10 | 127.30 (12) |
C6—C1—H1A | 119.6 | C7—C9—C10 | 127.52 (11) |
C3—C2—C1 | 120.07 (16) | N3—C10—C9 | 119.17 (12) |
C3—C2—H2A | 120.0 | N3—C10—H10A | 120.4 |
C1—C2—H2A | 120.0 | C9—C10—H10A | 120.4 |
C2—C3—C4 | 119.84 (15) | N5—C11—N4 | 112.28 (12) |
C2—C3—H3A | 120.1 | N5—C11—H11A | 123.9 |
C4—C3—H3A | 120.1 | N4—C11—H11A | 123.9 |
C3—C4—C5 | 120.62 (16) | N6—C12—N4 | 102.40 (10) |
C3—C4—H4A | 119.7 | N6—C12—S1 | 126.82 (9) |
C5—C4—H4A | 119.7 | N4—C12—S1 | 130.77 (9) |
C7—N1—N2—C8 | 0.32 (16) | N2—C8—C9—C7 | −0.12 (15) |
C10—N3—N4—C11 | 164.74 (13) | N2—C8—C9—C10 | 174.12 (13) |
C10—N3—N4—C12 | −21.8 (2) | N1—C7—C9—C8 | 0.33 (15) |
C11—N5—N6—C12 | −0.19 (18) | C6—C7—C9—C8 | 178.66 (13) |
C6—C1—C2—C3 | 0.0 (3) | N1—C7—C9—C10 | −173.91 (13) |
C1—C2—C3—C4 | 0.8 (3) | C6—C7—C9—C10 | 4.4 (2) |
C2—C3—C4—C5 | −0.4 (3) | N4—N3—C10—C9 | −178.11 (11) |
C3—C4—C5—C6 | −0.8 (3) | C8—C9—C10—N3 | 2.6 (2) |
C4—C5—C6—C1 | 1.6 (2) | C7—C9—C10—N3 | 175.63 (13) |
C4—C5—C6—C7 | −178.29 (14) | N6—N5—C11—N4 | 0.09 (18) |
C2—C1—C6—C5 | −1.2 (2) | C12—N4—C11—N5 | 0.03 (18) |
C2—C1—C6—C7 | 178.68 (15) | N3—N4—C11—N5 | 175.07 (12) |
N2—N1—C7—C9 | −0.39 (15) | N5—N6—C12—N4 | 0.20 (16) |
N2—N1—C7—C6 | −178.91 (12) | N5—N6—C12—S1 | −179.73 (11) |
C5—C6—C7—N1 | −143.18 (14) | C11—N4—C12—N6 | −0.14 (15) |
C1—C6—C7—N1 | 36.93 (19) | N3—N4—C12—N6 | −174.18 (13) |
C5—C6—C7—C9 | 38.6 (2) | C11—N4—C12—S1 | 179.79 (12) |
C1—C6—C7—C9 | −141.26 (15) | N3—N4—C12—S1 | 5.8 (2) |
N1—N2—C8—C9 | −0.12 (16) |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H1N2···S1i | 0.84 (2) | 2.59 (2) | 3.3593 (15) | 153.6 (17) |
N6—H1N6···N1ii | 0.90 (2) | 1.91 (2) | 2.7884 (15) | 168.0 (2) |
C10—H10A···S1 | 0.93 | 2.50 | 3.2183 (13) | 134 |
Symmetry codes: (i) x+1, −y+3/2, z−1/2; (ii) x−1, −y+3/2, z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C12H10N6S |
Mr | 270.32 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 296 |
a, b, c (Å) | 4.1180 (4), 17.9237 (16), 17.0787 (15) |
β (°) | 97.352 (3) |
V (Å3) | 1250.2 (2) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.25 |
Crystal size (mm) | 0.55 × 0.26 × 0.19 |
Data collection | |
Diffractometer | Bruker APEXII DUO CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2009) |
Tmin, Tmax | 0.872, 0.954 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 14262, 4361, 3204 |
Rint | 0.022 |
(sin θ/λ)max (Å−1) | 0.750 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.040, 0.120, 1.03 |
No. of reflections | 4361 |
No. of parameters | 180 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.29, −0.28 |
Computer programs: APEX2 (Bruker, 2009), SAINT (Bruker, 2009), SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H1N2···S1i | 0.84 (2) | 2.59 (2) | 3.3593 (15) | 153.6 (17) |
N6—H1N6···N1ii | 0.90 (2) | 1.91 (2) | 2.7884 (15) | 168.0 (2) |
C10—H10A···S1 | 0.9300 | 2.5000 | 3.2183 (13) | 134 |
Symmetry codes: (i) x+1, −y+3/2, z−1/2; (ii) x−1, −y+3/2, z+1/2. |
Footnotes
‡Thomson Reuters ResearcherID: A-3561-2009.
Acknowledgements
HKF and MH thank the Malaysian Government and Universiti Sains Malaysia for the Research University grant No. 1001/PFIZIK/811160. MH also thanks Universiti Sains Malaysia for a post-doctoral research fellowship. AMI thanks the Board for Research in Nuclear Sciences, Government of India for a Young Scientist award.
References
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Fun, H.-K., Quah, C. K., Malladi, S. & Isloor, A. M. (2010). Acta Cryst. E66, o2799–o2800. Web of Science CSD CrossRef IUCr Journals Google Scholar
Kahveci, B., Bekircan, O. & Karaoglu, S. A. (2005). Indian J. Chem. Sect. B, 44, 2614–2617. Google Scholar
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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.
Schiff bases derived from various heterocycles have been reported to possess antimicrobial (Kahveci et al., 2005), anticancer (Bekircan et al., 2006) and antifungal (Singh et al., 1988) activities. Recently, we have reported the crystal structure of 3-Ethyl-6-[3-(4-fluorophenyl)-1H-pyrazole-4-yl]- 1,2,4-triazolo[3,4-b][1,3,4]thiadiazole (Fun et al., 2010). In continuation of our studies of triazole derivatives, the title compound, (I), has been synthesized. Herewith we present its crystal structure.
In (I) (Fig. 1), the central pyrazole ring (N1–N2/C7–C9) makes dihedral angles of 37.64 (8) and 17.82 (8)° with the adjacent phenyl (C1–C6) and triazole (N4–N6/C11–C12) rings, respectively. The dihedral angle between the terminal phenyl (C1–C6) and triazole (N4–N6/C11–C12) rings is 47.08 (9)°. The molecule adopts an E configuration about the central C10═N3 double bond.
In the crystal structure, intermolecular N6—H1N6···N1 and N2—H1N2···S1 (Table 1) hydrogen bonds link the molecules into chains propagated in [2 0 -1].