organic compounds
Diethyl {[5-(2,4-dichlorophenyl)-1,3,4-thiadiazol-2-ylamino](4-methoxyphenyl)methyl}phosphonate
aDepartment of Applied Chemistry, College of Science, Nanjing University of Technology, No.5 Xinmofan Road, Nanjing, Nanjing 210009, People's Republic of China
*Correspondence e-mail: rwan@njut.edu.cn
The title compound, C20H22Cl2N3O4PS, was synthesized by the reaction of N-(4-methoxybenzylidene)-5-(2,4-dichlorophenyl)-1,3,4-thiadiazol-2-amine and diethyl phosphite. In the crystal, intermolecular C—H⋯O and N—H⋯O hydrogen bonds link the molecules.
Related literature
For applications of thiadiazole ligands, see: Nakagawa et al. (1996); Omar et al. (1986); Sato et al. (1991); Wang et al. (1999). For related structures, see: Wan et al. (2007); Yin et al. (2008). For bond-length data, see: Allen et al. (1987).
Experimental
Crystal data
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Refinement
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Data collection: CAD-4 EXPRESS (Enraf–Nonius, 1989); cell CAD-4 EXPRESS; data reduction: XCAD4 (Harms & Wocadlo, 1995); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXL97.
Supporting information
10.1107/S1600536809012471/ez2165sup1.cif
contains datablocks _global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536809012471/ez2165Isup2.hkl
N-(4–methoxyphenyl)-5-(2,4-dichlorophenyl)-1,3,4-thiadiazol-2-amine (2 mmol) and diethyl phosphite (5 mmol) were mixed in a 25 ml flask, and kept in an oil bath at 90°C for 6 h. After cooling, the crude product (I) precipitated and was filtered. Pure compound (I) was obtained by crystallization from ethanol (20 ml). Crystals of (I) suitable for X-ray diffraction were obtained by slow evaporation of an acetone solution.
All H atoms bonded to the C atoms were placed geometrically at the distances of 0.93–0.97 Å and included in the
in riding motion approximation with Uiso(H) = 1.2 or 1.5Ueq of the carrier atom.Data collection: CAD-4 EXPRESS (Enraf–Nonius, 1989); cell
CAD-4 EXPRESS (Enraf–Nonius, 1989); data reduction: XCAD4 (Harms & Wocadlo, 1995); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).C20H22Cl2N3O4PS | F(000) = 520 |
Mr = 502.34 | Dx = 1.409 Mg m−3 |
Triclinic, P1 | Melting point: 59365 K |
a = 9.7100 (19) Å | Mo Kα radiation, λ = 0.71073 Å |
b = 11.825 (2) Å | Cell parameters from 25 reflections |
c = 11.845 (2) Å | θ = 9–13° |
α = 98.74 (3)° | µ = 0.46 mm−1 |
β = 112.16 (3)° | T = 293 K |
γ = 103.05 (3)° | Block, colorless |
V = 1183.9 (4) Å3 | 0.30 × 0.20 × 0.10 mm |
Z = 2 |
Enraf–Nonius CAD-4 diffractometer | 2864 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.054 |
Graphite monochromator | θmax = 25.3°, θmin = 1.8° |
ω/2θ scans | h = 0→11 |
Absorption correction: ψ scan (North et al., 1968) | k = −14→13 |
Tmin = 0.874, Tmax = 0.955 | l = −14→13 |
4592 measured reflections | 3 standard reflections every 200 reflections |
4316 independent reflections | intensity decay: 1% |
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)] = 0.069 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.157 | H-atom parameters constrained |
S = 1.02 | w = 1/[σ2(Fo2) + (0.0281P)2 + 3.5816P] where P = (Fo2 + 2Fc2)/3 |
4316 reflections | (Δ/σ)max < 0.001 |
277 parameters | Δρmax = 0.56 e Å−3 |
0 restraints | Δρmin = −0.98 e Å−3 |
C20H22Cl2N3O4PS | γ = 103.05 (3)° |
Mr = 502.34 | V = 1183.9 (4) Å3 |
Triclinic, P1 | Z = 2 |
a = 9.7100 (19) Å | Mo Kα radiation |
b = 11.825 (2) Å | µ = 0.46 mm−1 |
c = 11.845 (2) Å | T = 293 K |
α = 98.74 (3)° | 0.30 × 0.20 × 0.10 mm |
β = 112.16 (3)° |
Enraf–Nonius CAD-4 diffractometer | 2864 reflections with I > 2σ(I) |
Absorption correction: ψ scan (North et al., 1968) | Rint = 0.054 |
Tmin = 0.874, Tmax = 0.955 | 3 standard reflections every 200 reflections |
4592 measured reflections | intensity decay: 1% |
4316 independent reflections |
R[F2 > 2σ(F2)] = 0.069 | 0 restraints |
wR(F2) = 0.157 | H-atom parameters constrained |
S = 1.02 | Δρmax = 0.56 e Å−3 |
4316 reflections | Δρmin = −0.98 e Å−3 |
277 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 | ||
Cl1 | 0.1915 (3) | −0.0588 (2) | 0.04559 (17) | 0.1292 (9) | |
Cl2 | 0.60795 (15) | 0.19354 (15) | 0.51042 (15) | 0.0812 (5) | |
S | 0.45871 (13) | 0.26753 (10) | 0.68952 (11) | 0.0518 (3) | |
P | 0.28539 (13) | 0.35163 (11) | 1.04983 (12) | 0.0508 (3) | |
N1 | 0.4404 (4) | 0.3110 (3) | 0.9121 (3) | 0.0524 (10) | |
H1A | 0.4934 | 0.3843 | 0.9247 | 0.063* | |
O1 | 0.1252 (4) | 0.2999 (3) | 0.9312 (4) | 0.0754 (11) | |
C1 | −0.0855 (9) | 0.3620 (8) | 0.8045 (8) | 0.112 | |
H1B | −0.1550 | 0.2881 | 0.7427 | 0.168* | |
H1C | −0.1008 | 0.4286 | 0.7694 | 0.168* | |
H1D | −0.1069 | 0.3689 | 0.8777 | 0.168* | |
N2 | 0.2791 (5) | 0.1297 (3) | 0.7581 (3) | 0.0541 (10) | |
O2 | 0.2564 (4) | 0.2931 (3) | 1.1510 (3) | 0.0698 (10) | |
C2 | 0.0749 (9) | 0.3624 (9) | 0.8405 (8) | 0.123 (3) | |
H2A | 0.0851 | 0.3269 | 0.7658 | 0.148* | |
H2B | 0.1427 | 0.4451 | 0.8733 | 0.148* | |
O3 | 0.3460 (4) | 0.4837 (3) | 1.0857 (3) | 0.0621 (9) | |
N3 | 0.2468 (4) | 0.0703 (3) | 0.6370 (3) | 0.0541 (10) | |
C3 | 0.2866 (11) | 0.4070 (7) | 1.3512 (7) | 0.127 (3) | |
H3A | 0.3578 | 0.3667 | 1.3943 | 0.191* | |
H3B | 0.2285 | 0.4241 | 1.3981 | 0.191* | |
H3C | 0.3443 | 0.4808 | 1.3440 | 0.191* | |
O4 | 0.9613 (4) | 0.3317 (3) | 1.4496 (4) | 0.0826 (12) | |
C4 | 0.1777 (9) | 0.3289 (7) | 1.2240 (7) | 0.100 (2) | |
H4A | 0.1134 | 0.2577 | 1.2320 | 0.120* | |
H4B | 0.1091 | 0.3715 | 1.1796 | 0.120* | |
C5 | 0.4108 (5) | 0.2749 (4) | 1.0145 (4) | 0.0461 (10) | |
H5A | 0.3525 | 0.1888 | 0.9834 | 0.055* | |
C6 | 0.5616 (5) | 0.2897 (4) | 1.1290 (4) | 0.0454 (10) | |
C7 | 0.6196 (5) | 0.1950 (4) | 1.1435 (5) | 0.0572 (12) | |
H7A | 0.5671 | 0.1221 | 1.0821 | 0.069* | |
C8 | 0.7548 (5) | 0.2052 (4) | 1.2475 (5) | 0.0583 (12) | |
H8A | 0.7942 | 0.1406 | 1.2546 | 0.070* | |
C9 | 0.8308 (5) | 0.3130 (4) | 1.3412 (5) | 0.0569 (12) | |
C10 | 0.7780 (6) | 0.4085 (4) | 1.3276 (5) | 0.0735 (16) | |
H10A | 0.8300 | 0.4811 | 1.3896 | 0.088* | |
C11 | 0.6447 (6) | 0.3977 (4) | 1.2197 (5) | 0.0670 (15) | |
H11A | 0.6114 | 0.4647 | 1.2088 | 0.080* | |
C13 | 0.3876 (5) | 0.2336 (4) | 0.7974 (4) | 0.0441 (10) | |
C14 | 0.3304 (5) | 0.1296 (4) | 0.5888 (4) | 0.0418 (9) | |
C15 | 0.3017 (5) | 0.0854 (4) | 0.4561 (4) | 0.0468 (10) | |
C16 | 0.1499 (5) | 0.0152 (4) | 0.3671 (4) | 0.0515 (11) | |
H16A | 0.0708 | −0.0020 | 0.3939 | 0.062* | |
C17 | 0.1154 (7) | −0.0281 (5) | 0.2443 (5) | 0.0700 (15) | |
H17A | 0.0133 | −0.0731 | 0.1882 | 0.084* | |
C18 | 0.2304 (8) | −0.0064 (5) | 0.2005 (5) | 0.0770 (17) | |
C19 | 0.3822 (8) | 0.0635 (6) | 0.2868 (6) | 0.0856 (19) | |
H19A | 0.4608 | 0.0802 | 0.2595 | 0.103* | |
C20 | 0.4161 (6) | 0.1077 (4) | 0.4115 (5) | 0.0553 (12) | |
C12 | 1.0077 (7) | 0.2351 (6) | 1.4818 (7) | 0.089 (2) | |
H12A | 0.9175 | 0.1691 | 1.4638 | 0.133* | |
H12B | 1.0760 | 0.2571 | 1.5703 | 0.133* | |
H12C | 1.0619 | 0.2116 | 1.4339 | 0.133* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cl1 | 0.1449 (18) | 0.1336 (17) | 0.0748 (11) | −0.0205 (14) | 0.0628 (12) | −0.0134 (10) |
Cl2 | 0.0454 (7) | 0.0980 (11) | 0.0881 (10) | 0.0027 (7) | 0.0353 (7) | 0.0024 (8) |
S | 0.0407 (6) | 0.0465 (6) | 0.0540 (6) | −0.0047 (5) | 0.0178 (5) | 0.0081 (5) |
P | 0.0381 (6) | 0.0437 (6) | 0.0588 (7) | 0.0023 (5) | 0.0147 (5) | 0.0120 (5) |
N1 | 0.052 (2) | 0.0392 (19) | 0.045 (2) | −0.0059 (16) | 0.0124 (17) | 0.0063 (16) |
O1 | 0.0436 (19) | 0.071 (2) | 0.083 (3) | 0.0092 (17) | 0.0032 (18) | 0.017 (2) |
C1 | 0.112 | 0.112 | 0.112 | 0.035 | 0.048 | 0.029 |
N2 | 0.058 (2) | 0.043 (2) | 0.049 (2) | −0.0044 (17) | 0.0235 (18) | 0.0071 (16) |
O2 | 0.076 (2) | 0.061 (2) | 0.080 (2) | 0.0123 (19) | 0.045 (2) | 0.0251 (19) |
C2 | 0.108 (6) | 0.143 (7) | 0.086 (5) | 0.030 (6) | 0.012 (4) | 0.030 (5) |
O3 | 0.055 (2) | 0.0462 (18) | 0.077 (2) | 0.0073 (15) | 0.0238 (17) | 0.0175 (16) |
N3 | 0.052 (2) | 0.046 (2) | 0.049 (2) | −0.0017 (17) | 0.0170 (18) | 0.0078 (17) |
C3 | 0.167 (9) | 0.098 (6) | 0.123 (7) | 0.036 (6) | 0.073 (7) | 0.027 (5) |
O4 | 0.060 (2) | 0.057 (2) | 0.091 (3) | 0.0136 (18) | −0.007 (2) | 0.019 (2) |
C4 | 0.112 (6) | 0.104 (5) | 0.117 (6) | 0.041 (5) | 0.076 (5) | 0.037 (5) |
C5 | 0.045 (2) | 0.037 (2) | 0.046 (2) | −0.0004 (18) | 0.0152 (19) | 0.0106 (18) |
C6 | 0.035 (2) | 0.040 (2) | 0.053 (2) | 0.0051 (18) | 0.0130 (19) | 0.0170 (19) |
C7 | 0.049 (3) | 0.046 (3) | 0.068 (3) | 0.010 (2) | 0.023 (2) | 0.005 (2) |
C8 | 0.042 (3) | 0.055 (3) | 0.073 (3) | 0.019 (2) | 0.017 (2) | 0.017 (2) |
C9 | 0.037 (2) | 0.047 (3) | 0.071 (3) | 0.008 (2) | 0.010 (2) | 0.015 (2) |
C10 | 0.060 (3) | 0.042 (3) | 0.077 (4) | 0.009 (2) | −0.006 (3) | 0.005 (2) |
C11 | 0.058 (3) | 0.042 (3) | 0.069 (3) | 0.015 (2) | −0.003 (2) | 0.005 (2) |
C13 | 0.031 (2) | 0.041 (2) | 0.049 (2) | 0.0038 (17) | 0.0097 (18) | 0.0123 (18) |
C14 | 0.032 (2) | 0.038 (2) | 0.052 (2) | 0.0068 (17) | 0.0179 (18) | 0.0104 (18) |
C15 | 0.044 (2) | 0.039 (2) | 0.055 (2) | 0.0091 (18) | 0.021 (2) | 0.0109 (19) |
C16 | 0.045 (2) | 0.046 (2) | 0.051 (2) | 0.001 (2) | 0.018 (2) | 0.003 (2) |
C17 | 0.072 (4) | 0.055 (3) | 0.059 (3) | −0.008 (3) | 0.022 (3) | 0.005 (2) |
C18 | 0.091 (4) | 0.062 (3) | 0.071 (3) | 0.001 (3) | 0.044 (3) | 0.008 (3) |
C19 | 0.087 (4) | 0.081 (4) | 0.091 (4) | 0.002 (3) | 0.060 (4) | 0.006 (3) |
C20 | 0.051 (3) | 0.052 (3) | 0.063 (3) | 0.006 (2) | 0.032 (2) | 0.008 (2) |
C12 | 0.063 (4) | 0.073 (4) | 0.110 (5) | 0.027 (3) | 0.007 (3) | 0.037 (4) |
Cl1—C18 | 1.709 (6) | C4—H4A | 0.9700 |
Cl2—C20 | 1.736 (5) | C4—H4B | 0.9700 |
S—C13 | 1.723 (4) | C5—C6 | 1.526 (6) |
S—C14 | 1.733 (4) | C5—H5A | 0.9800 |
P—O3 | 1.469 (3) | C6—C7 | 1.368 (6) |
P—O2 | 1.553 (4) | C6—C11 | 1.378 (6) |
P—O1 | 1.559 (4) | C7—C8 | 1.385 (7) |
P—C5 | 1.803 (5) | C7—H7A | 0.9300 |
N1—C13 | 1.354 (5) | C8—C9 | 1.388 (7) |
N1—C5 | 1.449 (5) | C8—H8A | 0.9300 |
N1—H1A | 0.8600 | C9—C10 | 1.348 (7) |
O1—C2 | 1.395 (9) | C10—C11 | 1.398 (7) |
C1—C2 | 1.450 (8) | C10—H10A | 0.9300 |
C1—H1B | 0.9600 | C11—H11A | 0.9300 |
C1—H1C | 0.9600 | C14—C15 | 1.475 (6) |
C1—H1D | 0.9600 | C15—C20 | 1.391 (6) |
N2—C13 | 1.306 (5) | C15—C16 | 1.408 (6) |
N2—N3 | 1.380 (5) | C16—C17 | 1.349 (7) |
O2—C4 | 1.430 (7) | C16—H16A | 0.9300 |
C2—H2A | 0.9700 | C17—C18 | 1.388 (8) |
C2—H2B | 0.9700 | C17—H17A | 0.9300 |
N3—C14 | 1.301 (5) | C18—C19 | 1.399 (8) |
C3—C4 | 1.475 (7) | C19—C20 | 1.373 (7) |
C3—H3A | 0.9600 | C19—H19A | 0.9300 |
C3—H3B | 0.9600 | C12—H12A | 0.9600 |
C3—H3C | 0.9600 | C12—H12B | 0.9600 |
O4—C9 | 1.365 (6) | C12—H12C | 0.9600 |
O4—C12 | 1.374 (7) | ||
C13—S—C14 | 87.0 (2) | C11—C6—C5 | 121.9 (4) |
O3—P—O2 | 116.2 (2) | C6—C7—C8 | 121.6 (5) |
O3—P—O1 | 113.2 (2) | C6—C7—H7A | 119.2 |
O2—P—O1 | 104.1 (2) | C8—C7—H7A | 119.2 |
O3—P—C5 | 115.3 (2) | C7—C8—C9 | 119.3 (5) |
O2—P—C5 | 101.5 (2) | C7—C8—H8A | 120.4 |
O1—P—C5 | 105.2 (2) | C9—C8—H8A | 120.4 |
C13—N1—C5 | 122.3 (3) | C10—C9—O4 | 115.6 (4) |
C13—N1—H1A | 118.8 | C10—C9—C8 | 120.2 (5) |
C5—N1—H1A | 118.8 | O4—C9—C8 | 124.2 (4) |
C2—O1—P | 122.8 (4) | C9—C10—C11 | 119.6 (5) |
C2—C1—H1B | 109.5 | C9—C10—H10A | 120.2 |
C2—C1—H1C | 109.5 | C11—C10—H10A | 120.2 |
H1B—C1—H1C | 109.5 | C6—C11—C10 | 121.4 (5) |
C2—C1—H1D | 109.5 | C6—C11—H11A | 119.3 |
H1B—C1—H1D | 109.5 | C10—C11—H11A | 119.3 |
H1C—C1—H1D | 109.5 | N2—C13—N1 | 124.0 (4) |
C13—N2—N3 | 111.7 (4) | N2—C13—S | 114.6 (3) |
C4—O2—P | 126.3 (4) | N1—C13—S | 121.4 (3) |
O1—C2—C1 | 113.6 (7) | N3—C14—C15 | 121.0 (4) |
O1—C2—H2A | 108.8 | N3—C14—S | 113.4 (3) |
C1—C2—H2A | 108.8 | C15—C14—S | 125.3 (3) |
O1—C2—H2B | 108.8 | C20—C15—C16 | 116.7 (4) |
C1—C2—H2B | 108.8 | C20—C15—C14 | 124.2 (4) |
H2A—C2—H2B | 107.7 | C16—C15—C14 | 119.1 (4) |
C14—N3—N2 | 113.4 (3) | C17—C16—C15 | 122.2 (5) |
C4—C3—H3A | 109.5 | C17—C16—H16A | 118.9 |
C4—C3—H3B | 109.5 | C15—C16—H16A | 118.9 |
H3A—C3—H3B | 109.5 | C16—C17—C18 | 120.8 (5) |
C4—C3—H3C | 109.5 | C16—C17—H17A | 119.6 |
H3A—C3—H3C | 109.5 | C18—C17—H17A | 119.6 |
H3B—C3—H3C | 109.5 | C17—C18—C19 | 118.2 (5) |
C9—O4—C12 | 119.5 (4) | C17—C18—Cl1 | 122.4 (5) |
O2—C4—C3 | 112.8 (6) | C19—C18—Cl1 | 119.5 (4) |
O2—C4—H4A | 109.0 | C20—C19—C18 | 120.6 (5) |
C3—C4—H4A | 109.0 | C20—C19—H19A | 119.7 |
O2—C4—H4B | 109.0 | C18—C19—H19A | 119.7 |
C3—C4—H4B | 109.0 | C19—C20—C15 | 121.5 (5) |
H4A—C4—H4B | 107.8 | C19—C20—Cl2 | 116.8 (4) |
N1—C5—C6 | 112.2 (3) | C15—C20—Cl2 | 121.7 (4) |
N1—C5—P | 109.5 (3) | O4—C12—H12A | 109.5 |
C6—C5—P | 113.9 (3) | O4—C12—H12B | 109.5 |
N1—C5—H5A | 106.9 | H12A—C12—H12B | 109.5 |
C6—C5—H5A | 106.9 | O4—C12—H12C | 109.5 |
P—C5—H5A | 106.9 | H12A—C12—H12C | 109.5 |
C7—C6—C11 | 117.8 (4) | H12B—C12—H12C | 109.5 |
C7—C6—C5 | 120.3 (4) | ||
O3—P—O1—C2 | 24.0 (6) | C7—C6—C11—C10 | −4.4 (8) |
O2—P—O1—C2 | 151.1 (6) | C5—C6—C11—C10 | 176.5 (5) |
C5—P—O1—C2 | −102.7 (6) | C9—C10—C11—C6 | 2.9 (10) |
O3—P—O2—C4 | 46.8 (6) | N3—N2—C13—N1 | 179.2 (4) |
O1—P—O2—C4 | −78.3 (5) | N3—N2—C13—S | 0.2 (5) |
C5—P—O2—C4 | 172.6 (5) | C5—N1—C13—N2 | 15.7 (7) |
P—O1—C2—C1 | −133.6 (6) | C5—N1—C13—S | −165.4 (3) |
C13—N2—N3—C14 | 0.1 (6) | C14—S—C13—N2 | −0.3 (4) |
P—O2—C4—C3 | −98.2 (7) | C14—S—C13—N1 | −179.3 (4) |
C13—N1—C5—C6 | 118.7 (4) | N2—N3—C14—C15 | −174.2 (4) |
C13—N1—C5—P | −113.8 (4) | N2—N3—C14—S | −0.4 (5) |
O3—P—C5—N1 | −58.4 (3) | C13—S—C14—N3 | 0.4 (4) |
O2—P—C5—N1 | 175.2 (3) | C13—S—C14—C15 | 173.9 (4) |
O1—P—C5—N1 | 67.0 (3) | N3—C14—C15—C20 | −150.9 (5) |
O3—P—C5—C6 | 68.1 (3) | S—C14—C15—C20 | 36.0 (7) |
O2—P—C5—C6 | −58.3 (3) | N3—C14—C15—C16 | 28.6 (7) |
O1—P—C5—C6 | −166.5 (3) | S—C14—C15—C16 | −144.4 (4) |
N1—C5—C6—C7 | −93.9 (5) | C20—C15—C16—C17 | −0.5 (7) |
P—C5—C6—C7 | 141.0 (4) | C14—C15—C16—C17 | 180.0 (5) |
N1—C5—C6—C11 | 85.2 (6) | C15—C16—C17—C18 | 1.0 (9) |
P—C5—C6—C11 | −39.9 (6) | C16—C17—C18—C19 | −1.2 (9) |
C11—C6—C7—C8 | 1.9 (7) | C16—C17—C18—Cl1 | −179.6 (5) |
C5—C6—C7—C8 | −178.9 (4) | C17—C18—C19—C20 | 0.9 (10) |
C6—C7—C8—C9 | 1.9 (8) | Cl1—C18—C19—C20 | 179.3 (5) |
C12—O4—C9—C10 | 168.9 (6) | C18—C19—C20—C15 | −0.4 (10) |
C12—O4—C9—C8 | −12.1 (9) | C18—C19—C20—Cl2 | −179.9 (5) |
C7—C8—C9—C10 | −3.5 (8) | C16—C15—C20—C19 | 0.2 (8) |
C7—C8—C9—O4 | 177.5 (5) | C14—C15—C20—C19 | 179.7 (5) |
O4—C9—C10—C11 | −179.8 (5) | C16—C15—C20—Cl2 | 179.6 (4) |
C8—C9—C10—C11 | 1.1 (9) | C14—C15—C20—Cl2 | −0.8 (7) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1A···O3i | 0.86 | 2.00 | 2.805 (5) | 156 |
C10—H10A···O4ii | 0.93 | 2.53 | 3.431 (7) | 163 |
Symmetry codes: (i) −x+1, −y+1, −z+2; (ii) −x+2, −y+1, −z+3. |
Experimental details
Crystal data | |
Chemical formula | C20H22Cl2N3O4PS |
Mr | 502.34 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 293 |
a, b, c (Å) | 9.7100 (19), 11.825 (2), 11.845 (2) |
α, β, γ (°) | 98.74 (3), 112.16 (3), 103.05 (3) |
V (Å3) | 1183.9 (4) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.46 |
Crystal size (mm) | 0.30 × 0.20 × 0.10 |
Data collection | |
Diffractometer | Enraf–Nonius CAD-4 diffractometer |
Absorption correction | ψ scan (North et al., 1968) |
Tmin, Tmax | 0.874, 0.955 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 4592, 4316, 2864 |
Rint | 0.054 |
(sin θ/λ)max (Å−1) | 0.601 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.069, 0.157, 1.02 |
No. of reflections | 4316 |
No. of parameters | 277 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.56, −0.98 |
Computer programs: CAD-4 EXPRESS (Enraf–Nonius, 1989), CAD-4 EXPRESS (Enraf–Nonius, 1989), XCAD4 (Harms & Wocadlo, 1995), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1A···O3i | 0.8600 | 2.0000 | 2.805 (5) | 156.00 |
C10—H10A···O4ii | 0.9300 | 2.5300 | 3.431 (7) | 163.00 |
Symmetry codes: (i) −x+1, −y+1, −z+2; (ii) −x+2, −y+1, −z+3. |
Acknowledgements
The authors thank Professor Hua-qin Wang of the Analysis Centre, Nanjing University, for carrying out the X-ray crystallographic analysis.
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.
1,3,4-Thiadiazole derivatives represent an interesting class of compounds possessing broad spectrum biological activities (Nakagawa et al., 1996). These compounds are known to exhibit diverse biological effects, such as insecticidal and fungicidal activities (Wang et al., 1999). They can also be widely used in the field of medicine (Sato et al., 1991), such as for anti-cancer drugs (Omar et al., 1986).
We report here the crystal structure of the title compound,(I). The molecular structure of (I) is shown in Fig.1. Bond lengths are in the normal ranges (Allen et al., 1987). The dihedral angle between the C15—C20 and S/C13/N2/N3/C14 is 32.4 (3)°, which shows that these two aromatic rings are not in the same plane. This dihedral angle is bigger than other phosphonate compounds, which is 7.54 (3)° (Wan et al., 2007) and 5.3 (2)° (Yin et al., 2008). There are intermolecular C—H···O and N—H···O hydrogen bonds (Fig. 2), which form chains along the b axis in the crystal.