organic compounds
N-(3-Pyridylmethylene)-N′-[5-(3-pyridylmethylsulfanyl)-1,3,4-thiadiazol-2-yl]hydrazine
aDepartment of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPM, Selangor, Malaysia, and bChemical Crystallography, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, England
*Correspondence e-mail: teng-jin@rocketmail.com
In the 14H12N6S2, the molecules are linked into centrosymmetric dimers through N—H⋯N hydrogen interactions, forming two-dimensional layers parallel to (010).
of the title compound, CComment
1,3,4-Thiadiazole derivatives have been synthesized for their potential bioactivity. They have been used as herbicides and insecticides, and some of them are known to possess antimycobacterial, anesthetic and antidepressant activity (Demirbas et al., 2004; Mamolo et al., 2001; Orú et al., 2004). The structure can be varied to explore the structure–activity relationship by substituting the alkyl or at either end of the molecule. In the course of our research, we have managed to grow crystals of the title compound, (I), from ethanol.
In the trans to each other, as shown in Fig. 1. The C7—S2—C8 bond angle of 85.84 (11)° is at the lower end of the range reported in the literature (Vinkovic et al., 1994), possibly due to the presence of two strong electron-donating atoms (S1 and N4) at either side of the ring. In the the molecules are linked through N—H⋯N hydrogen interactions (Table 2) into centrosymmetric dimers, forming two-dimensional layers parallel to (010).
the molecule is L-shaped, with the pyridine ring containing N1 bent at C6 with an angle of 112.42 (16)° for C4—C6—S1, while the rest of the molecule is nearly coplanar with the thiadiazole plane. The pyridine rings areExperimental
The title compound was synthesized according to the procedure described by Crouse et al. (2004). Brown–orange block-shaped crystals suitable for X-ray analysis were isolated after two weeks by slow evaporation of an ethanol solution of the crude product at room temperature.
Crystal data
|
Refinement
|
The N-bound H atom was located in a difference map and refined freely. All C-bound H atoms were located in a difference map and initially refined with soft restraints on the bond lengths and angles to regularize their geometry (C–H 0.93–98 Å) and isotropic atomic displacement parameters [Uiso(H) = 1.2 or 1.5Ueq(parent atom)], after which they were refined with riding constraints.
Data collection: COLLECT (Nonius, 2001); cell DENZO/SCALEPACK (Otwinowski & Minor, 1997); data reduction: DENZO/SCALEPACK; program(s) used to solve structure: SIR92 (Altomare et al., 1993); program(s) used to refine structure: CRYSTALS (Betteridge et al., 2003); molecular graphics: CAMERON (Watkin et al., 1996); software used to prepare material for publication: CRYSTALS.
Supporting information
10.1107/S1600536805030035/rz6113sup1.cif
contains datablocks I, CRYSTALS_cif. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536805030035/rz6113Isup2.hkl
The title compound was synthesized according to the procedure described by Crouse et al. (2004). Brown–orange block-shaped crystals suitable for X-ray analysis were isolated after two weeks by slow evaporation of an ethanol solution of the crude product at room temperature.
The N-bound H atom was located in a difference map and refined freely. All C-bound H atoms were located in a difference map and initially refined with soft restraints on the bond lengths and angles to regularize their geometry (C–H 0.93–98 Å) and isotropic atomic displacement parameters [Uiso(H) = 1.2 or 1.5Ueq(parent atom)], after which they were refined with riding constraints.
Data collection: COLLECT (Nonius, 2001); cell
DENZO/SCALEPACK (Otwinowski & Minor, 1997); data reduction: DENZO/SCALEPACK; program(s) used to solve structure: SIR92 (Altomare et al., 1993); program(s) used to refine structure: CRYSTALS (Betteridge et al., 2003); molecular graphics: CAMERON (Watkin et al., 1996); software used to prepare material for publication: CRYSTALS.Fig. 1. : The molecular structure of (I), with the atom-numbering scheme. Displacement ellipsoids are drawn at the 50% probability level. |
C14H12N6S2 | Z = 2 |
Mr = 328.42 | F(000) = 340 |
Triclinic, P1 | Dx = 1.479 Mg m−3 |
Hall symbol: -P 1 | Melting point: 150 K |
a = 4.5955 (2) Å | Mo Kα radiation, λ = 0.71073 Å |
b = 11.4301 (4) Å | Cell parameters from 2920 reflections |
c = 14.8292 (6) Å | θ = 1–27° |
α = 74.1696 (12)° | µ = 0.37 mm−1 |
β = 83.0827 (14)° | T = 150 K |
γ = 80.8197 (13)° | Block, brown–orange |
V = 737.36 (5) Å3 | 0.01 × 0.01 × 0.01 mm |
Nonius Kappa CCD diffractometer | 2154 reflections with I > 3σ(I) |
Graphite monochromator | Rint = 0.026 |
ω scans | θmax = 27.6°, θmin = 3.0° |
Absorption correction: multi-scan DENZO/SCALEPACK (Otwinowski & Minor, 1997) | h = −5→5 |
Tmin = 1.00, Tmax = 1.00 | k = −14→14 |
5604 measured reflections | l = −18→19 |
3327 independent reflections |
Refinement on F | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.043 | H atoms treated by a mixture of independent and constrained refinement |
wR(F2) = 0.049 | Method, part 1, Chebychev polynomial, (Watkin, 1994, Prince, 1982) [weight] = 1.0/[A0*T0(x) + A1*T1(x) ··· + An-1]*Tn-1(x)] where Ai are the Chebychev coefficients listed below and x = F /Fmax Method = Robust Weighting (Prince, 1982) W = [weight] * [1-(δF/6*σF)2]2 Ai are: 1.61 0.745 1.30 |
S = 1.07 | (Δ/σ)max = 0.000202 |
2154 reflections | Δρmax = 0.39 e Å−3 |
203 parameters | Δρmin = −0.32 e Å−3 |
0 restraints |
C14H12N6S2 | γ = 80.8197 (13)° |
Mr = 328.42 | V = 737.36 (5) Å3 |
Triclinic, P1 | Z = 2 |
a = 4.5955 (2) Å | Mo Kα radiation |
b = 11.4301 (4) Å | µ = 0.37 mm−1 |
c = 14.8292 (6) Å | T = 150 K |
α = 74.1696 (12)° | 0.01 × 0.01 × 0.01 mm |
β = 83.0827 (14)° |
Nonius Kappa CCD diffractometer | 3327 independent reflections |
Absorption correction: multi-scan DENZO/SCALEPACK (Otwinowski & Minor, 1997) | 2154 reflections with I > 3σ(I) |
Tmin = 1.00, Tmax = 1.00 | Rint = 0.026 |
5604 measured reflections |
R[F2 > 2σ(F2)] = 0.043 | 0 restraints |
wR(F2) = 0.049 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.07 | Δρmax = 0.39 e Å−3 |
2154 reflections | Δρmin = −0.32 e Å−3 |
203 parameters |
x | y | z | Uiso*/Ueq | ||
H1 | −0.5252 | 0.6025 | 0.2993 | 0.0689* | |
H2 | −0.0376 | 0.6182 | 0.5004 | 0.0730* | |
H3 | −0.1511 | 0.8256 | 0.4622 | 0.0640* | |
H4 | −0.4378 | 0.9288 | 0.3448 | 0.0680* | |
H5 | −0.8580 | 0.8962 | 0.2436 | 0.0629* | |
H6 | −0.7873 | 0.7770 | 0.2057 | 0.0630* | |
H7 | 0.257 (8) | 0.543 (3) | −0.056 (2) | 0.040 (8)* | |
H8 | 0.6066 | 0.5559 | −0.1666 | 0.0340* | |
H9 | 1.0196 | 0.5613 | −0.2946 | 0.0650* | |
H10 | 1.3262 | 0.6734 | −0.4067 | 0.0640* | |
H11 | 1.3413 | 0.8767 | −0.4148 | 0.0719* | |
H12 | 0.7091 | 0.8710 | −0.2088 | 0.0669* | |
S1 | −0.48631 (14) | 0.92252 (5) | 0.12260 (5) | 0.0289 | |
S2 | 0.00314 (14) | 0.82978 (5) | −0.00637 (5) | 0.0271 | |
N1 | −0.2752 (7) | 0.5872 (2) | 0.40325 (18) | 0.0483 | |
N2 | −0.3359 (5) | 0.68790 (18) | 0.10971 (16) | 0.0282 | |
N3 | −0.1392 (5) | 0.61232 (18) | 0.06430 (15) | 0.0279 | |
N4 | 0.2561 (5) | 0.6195 (2) | −0.05079 (16) | 0.0285 | |
N5 | 0.4411 (5) | 0.69178 (19) | −0.11336 (15) | 0.0275 | |
N6 | 1.0191 (6) | 0.8947 (3) | −0.3149 (2) | 0.0465 | |
C1 | −0.1688 (7) | 0.6541 (3) | 0.4497 (2) | 0.0451 | |
C2 | −0.4437 (7) | 0.6487 (3) | 0.3328 (2) | 0.0409 | |
C3 | −0.2263 (7) | 0.7802 (3) | 0.4293 (2) | 0.0418 | |
C4 | −0.5131 (6) | 0.7752 (2) | 0.30629 (18) | 0.0309 | |
C5 | −0.4004 (7) | 0.8419 (3) | 0.3564 (2) | 0.0373 | |
C6 | −0.7004 (6) | 0.8379 (2) | 0.22499 (19) | 0.0322 | |
C7 | −0.2880 (5) | 0.8016 (2) | 0.08095 (17) | 0.0260 | |
C8 | 0.0471 (5) | 0.6741 (2) | 0.00293 (17) | 0.0242 | |
C9 | 0.6176 (6) | 0.6381 (2) | −0.16785 (19) | 0.0292 | |
C10 | 0.8247 (5) | 0.7047 (2) | −0.23758 (18) | 0.0292 | |
C11 | 1.0169 (6) | 0.6457 (3) | −0.2966 (2) | 0.0349 | |
C12 | 1.2071 (7) | 0.7114 (3) | −0.3634 (2) | 0.0423 | |
C13 | 1.2005 (7) | 0.8349 (3) | −0.3706 (2) | 0.0445 | |
C14 | 0.8345 (6) | 0.8298 (3) | −0.2502 (2) | 0.0355 |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0334 (3) | 0.0211 (3) | 0.0310 (3) | 0.0010 (2) | −0.0009 (3) | −0.0080 (2) |
S2 | 0.0270 (3) | 0.0201 (3) | 0.0343 (4) | −0.0028 (2) | −0.0002 (2) | −0.0083 (2) |
N1 | 0.0661 (18) | 0.0356 (13) | 0.0370 (14) | 0.0067 (12) | −0.0094 (13) | −0.0042 (11) |
N2 | 0.0291 (11) | 0.0212 (10) | 0.0335 (11) | 0.0002 (8) | −0.0021 (9) | −0.0080 (8) |
N3 | 0.0284 (11) | 0.0221 (10) | 0.0327 (11) | −0.0009 (8) | 0.0026 (9) | −0.0097 (8) |
N4 | 0.0285 (10) | 0.0211 (10) | 0.0364 (12) | −0.0037 (8) | 0.0020 (8) | −0.0098 (8) |
N5 | 0.0228 (10) | 0.0259 (10) | 0.0342 (11) | −0.0016 (8) | −0.0018 (8) | −0.0095 (8) |
N6 | 0.0522 (16) | 0.0396 (14) | 0.0468 (15) | −0.0141 (12) | 0.0065 (12) | −0.0096 (11) |
C1 | 0.0476 (17) | 0.0492 (17) | 0.0327 (15) | 0.0081 (14) | −0.0076 (13) | −0.0074 (13) |
C2 | 0.0511 (18) | 0.0330 (14) | 0.0363 (14) | −0.0028 (12) | −0.0012 (13) | −0.0076 (12) |
C3 | 0.0427 (16) | 0.0501 (17) | 0.0335 (15) | −0.0046 (13) | −0.0028 (12) | −0.0135 (13) |
C4 | 0.0262 (12) | 0.0354 (13) | 0.0287 (12) | −0.0006 (10) | 0.0016 (10) | −0.0082 (10) |
C5 | 0.0414 (15) | 0.0333 (14) | 0.0366 (14) | −0.0036 (11) | −0.0028 (12) | −0.0092 (11) |
C6 | 0.0282 (13) | 0.0320 (13) | 0.0351 (14) | −0.0019 (10) | −0.0011 (10) | −0.0080 (11) |
C7 | 0.0243 (11) | 0.0247 (11) | 0.0280 (12) | −0.0019 (9) | −0.0039 (9) | −0.0051 (9) |
C8 | 0.0233 (11) | 0.0202 (10) | 0.0297 (12) | −0.0014 (9) | −0.0053 (9) | −0.0069 (9) |
C9 | 0.0292 (13) | 0.0236 (11) | 0.0354 (13) | −0.0039 (9) | −0.0021 (10) | −0.0087 (10) |
C10 | 0.0236 (12) | 0.0342 (13) | 0.0311 (13) | −0.0028 (10) | −0.0052 (10) | −0.0100 (10) |
C11 | 0.0309 (13) | 0.0361 (14) | 0.0398 (14) | −0.0018 (11) | −0.0018 (11) | −0.0151 (12) |
C12 | 0.0325 (14) | 0.0594 (19) | 0.0382 (15) | −0.0037 (13) | 0.0006 (12) | −0.0207 (14) |
C13 | 0.0404 (16) | 0.0528 (19) | 0.0403 (16) | −0.0153 (14) | 0.0021 (13) | −0.0089 (14) |
C14 | 0.0352 (14) | 0.0321 (13) | 0.0404 (15) | −0.0064 (11) | 0.0011 (11) | −0.0120 (11) |
H1—C2 | 0.958 | N2—N3 | 1.392 (3) |
H2—C1 | 0.980 | N2—C7 | 1.298 (3) |
H3—C3 | 0.929 | N3—C8 | 1.310 (3) |
H4—C5 | 0.952 | N4—N5 | 1.372 (3) |
H5—C6 | 0.971 | N4—C8 | 1.357 (3) |
H6—C6 | 0.976 | N5—C9 | 1.281 (3) |
H7—N4 | 0.90 (4) | N6—C13 | 1.344 (4) |
H8—C9 | 0.944 | N6—C14 | 1.344 (4) |
H9—C11 | 0.956 | C1—C3 | 1.377 (5) |
H10—C12 | 0.945 | C2—C4 | 1.385 (4) |
H11—C13 | 0.950 | C3—C5 | 1.385 (4) |
H12—C14 | 0.958 | C4—C5 | 1.389 (4) |
S1—C6 | 1.831 (3) | C4—C6 | 1.513 (4) |
S1—C7 | 1.746 (3) | C9—C10 | 1.456 (4) |
S2—C7 | 1.750 (3) | C10—C11 | 1.395 (4) |
S2—C8 | 1.727 (2) | C10—C14 | 1.398 (4) |
N1—C1 | 1.336 (5) | C11—C12 | 1.380 (4) |
N1—C2 | 1.344 (4) | C12—C13 | 1.382 (5) |
C6—S1—C7 | 100.67 (12) | C4—C6—H5 | 110.1 |
C7—S2—C8 | 85.84 (11) | S1—C6—H5 | 107.4 |
C1—N1—C2 | 116.9 (3) | H6—C6—H5 | 109.0 |
N3—N2—C7 | 112.2 (2) | S2—C7—S1 | 119.78 (14) |
N2—N3—C8 | 111.8 (2) | S2—C7—N2 | 114.84 (19) |
H7—N4—N5 | 118 (2) | S1—C7—N2 | 125.4 (2) |
H7—N4—C8 | 123 (2) | S2—C8—N4 | 122.56 (19) |
N5—N4—C8 | 117.9 (2) | S2—C8—N3 | 115.38 (18) |
N4—N5—C9 | 115.5 (2) | N4—C8—N3 | 122.1 (2) |
C13—N6—C14 | 117.3 (3) | H8—C9—N5 | 120.6 |
H2—C1—N1 | 123.1 | H8—C9—C10 | 118.4 |
H2—C1—C3 | 113.5 | N5—C9—C10 | 120.9 (2) |
N1—C1—C3 | 123.3 (3) | C9—C10—C11 | 120.6 (2) |
H1—C2—N1 | 118.3 | C9—C10—C14 | 122.0 (2) |
H1—C2—C4 | 117.4 | C11—C10—C14 | 117.3 (3) |
N1—C2—C4 | 124.3 (3) | H9—C11—C10 | 122.9 |
H3—C3—C1 | 122.5 | H9—C11—C12 | 117.5 |
H3—C3—C5 | 118.6 | C10—C11—C12 | 119.6 (3) |
C1—C3—C5 | 118.9 (3) | H10—C12—C11 | 119.7 |
C2—C4—C5 | 117.3 (3) | H10—C12—C13 | 121.2 |
C2—C4—C6 | 121.2 (3) | C11—C12—C13 | 118.9 (3) |
C5—C4—C6 | 121.5 (2) | H11—C13—C12 | 117.0 |
H4—C5—C4 | 124.1 | H11—C13—N6 | 119.7 |
H4—C5—C3 | 116.6 | C12—C13—N6 | 123.2 (3) |
C4—C5—C3 | 119.2 (3) | H12—C14—C10 | 118.4 |
C4—C6—S1 | 112.42 (18) | H12—C14—N6 | 117.9 |
C4—C6—H6 | 109.8 | C10—C14—N6 | 123.7 (3) |
S1—C6—H6 | 108.0 |
D—H···A | D—H | H···A | D···A | D—H···A |
N4—H7···N3i | 0.90 (4) | 1.98 (4) | 2.849 (3) | 164 (3) |
Symmetry code: (i) −x, −y+1, −z. |
Experimental details
Crystal data | |
Chemical formula | C14H12N6S2 |
Mr | 328.42 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 150 |
a, b, c (Å) | 4.5955 (2), 11.4301 (4), 14.8292 (6) |
α, β, γ (°) | 74.1696 (12), 83.0827 (14), 80.8197 (13) |
V (Å3) | 737.36 (5) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.37 |
Crystal size (mm) | 0.01 × 0.01 × 0.01 |
Data collection | |
Diffractometer | Nonius Kappa CCD diffractometer |
Absorption correction | Multi-scan DENZO/SCALEPACK (Otwinowski & Minor, 1997) |
Tmin, Tmax | 1.00, 1.00 |
No. of measured, independent and observed [I > 3σ(I)] reflections | 5604, 3327, 2154 |
Rint | 0.026 |
(sin θ/λ)max (Å−1) | 0.652 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.043, 0.049, 1.07 |
No. of reflections | 2154 |
No. of parameters | 203 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.39, −0.32 |
Computer programs: COLLECT (Nonius, 2001), DENZO/SCALEPACK (Otwinowski & Minor, 1997), DENZO/SCALEPACK, SIR92 (Altomare et al., 1993), CRYSTALS (Betteridge et al., 2003), CAMERON (Watkin et al., 1996), CRYSTALS.
S1—C6 | 1.831 (3) | N2—C7 | 1.298 (3) |
S1—C7 | 1.746 (3) | N3—C8 | 1.310 (3) |
S2—C7 | 1.750 (3) | N4—N5 | 1.372 (3) |
S2—C8 | 1.727 (2) | N4—C8 | 1.357 (3) |
N1—C1 | 1.336 (5) | N5—C9 | 1.281 (3) |
N1—C2 | 1.344 (4) | N6—C13 | 1.344 (4) |
N2—N3 | 1.392 (3) | N6—C14 | 1.344 (4) |
C6—S1—C7 | 100.67 (12) | C4—C6—S1 | 112.42 (18) |
C7—S2—C8 | 85.84 (11) | S2—C7—S1 | 119.78 (14) |
C1—N1—C2 | 116.9 (3) | S2—C7—N2 | 114.84 (19) |
N3—N2—C7 | 112.2 (2) | S1—C7—N2 | 125.4 (2) |
N2—N3—C8 | 111.8 (2) | S2—C8—N4 | 122.56 (19) |
N5—N4—C8 | 117.9 (2) | S2—C8—N3 | 115.38 (18) |
N4—N5—C9 | 115.5 (2) | N4—C8—N3 | 122.1 (2) |
C13—N6—C14 | 117.3 (3) | N5—C9—C10 | 120.9 (2) |
N1—C1—C3 | 123.3 (3) | C12—C13—N6 | 123.2 (3) |
N1—C2—C4 | 124.3 (3) | C10—C14—N6 | 123.7 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
N4—H7···N3i | 0.90 (4) | 1.98 (4) | 2.849 (3) | 164 (3) |
Symmetry code: (i) −x, −y+1, −z. |
Acknowledgements
Khoo Teng Jin gratefully acknowledges MOSTI, Malaysia, for an attachment grant under an NSF scholarship, and the Chemical Crystallography Laboratory, Oxford University, for instrumental facilities.
References
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1,3,4-Thiadiazole derivatives have been synthesized for their potential bioactivity. They have been used as herbicides and insecticides, and some of them are known to possess antimycobacterial, anesthetic and antidepressant activity (Demirbas et al., 2004; Mamolo or Mamalo et al., 2001; Or\,u et al., 2004). The structure can be varied to explore the structure–activity relationship by substituting the alkyl or aryl groups at either end of the moiety. In the course of our research, we have managed to grow the title compound, (I), in ethanol.
The crystal structure forms an L-shaped molecule, with the pyridine ring containing N1 bent at C6 with an angle of 112.4 (3)°, while the rest of the molecule is nearly coplanar with the thiadiazole plane. The pyridine rings are trans to each other at both ends of the molecule, as shown in Fig. 1. The C7—S2—C8 bond angle of 85.9 (2)° is at the lower end of the range reported in the literature (reference?), possibly due to the presence of two strong electron-donating atoms (S1 and N4) at either side of the ring. In the crystal structure, the molecules are linked through N—H···N hydrogen interactions (Table 2) into centrosymmetric dimers, forming two-dimensional layers parallel to the b axis.