organic compounds
3-Acetyl-1-(2,3-dichlorophenyl)thiourea
aDepartment of Chemistry, Mangalore University, Mangalagangotri 574 199, Mangalore, India, and bInstitute of Materials Science, Darmstadt University of Technology, Petersenstrasse 23, D-64287 Darmstadt, Germany
*Correspondence e-mail: gowdabt@yahoo.com
In the 9H8Cl2N2OS, there are two molecules in the which are connected by a pair of N—H⋯S hydrogen bonds. An intramolecular N—H⋯O hydrogen bond stabilizes the molecular conformation of each molecule.
of the title compound, CRelated literature
For studies on the effects of substituents on the structures and other aspects of N-(aryl)-amides, see: Gowda et al. (2001); Kumar et al. (2012); Shahwar et al. (2012). For N-(aryl)-methanesulfonamides, see: Gowda et al. (2007). For N-chloroarylsulfonamides, see: Gowda & Ramachandra (1989), Shetty & Gowda (2004).
Experimental
Crystal data
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Refinement
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Data collection: CrysAlis CCD (Oxford Diffraction, 2009); cell CrysAlis RED (Oxford Diffraction, 2009); data reduction: CrysAlis RED; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97.
Supporting information
https://doi.org/10.1107/S1600536812030176/bt5964sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536812030176/bt5964Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536812030176/bt5964Isup3.cml
3-Acetyl-1-(2,3-dichlorophenyl)thiourea was synthesized by adding a solution of acetyl chloride (0.10 mol) in acetone (30 ml) dropwise to a suspension of ammonium thiocyanate (0.10 mol) in acetone (30 ml). The reaction mixture was refluxed for 30 min. After cooling to room temperature, a solution of 2,3-dichloroaniline (0.10 mol) in acetone (10 ml) was added and refluxed for 3 h. The reaction mixture was poured into acidified cold water. The precipitated title compound was recrystallized to constant melting point from acetonitrile. The purity of the compound was checked and characterized by its infrared spectrum.
Prism like light yellow single crystals used in X-ray diffraction studies were grown in acetonitrile solution by slow evaporation of the solvent at room temperature.
The coordinates of the amino H atoms were refined with the N—H distances restrained to 0.86 (2) Å. H atoms bonded to C were positioned with idealized geometry using a riding model with the aromatic C—H = 0.93 Å, methyl C—H = 0.96 Å. All H atoms were refined with their isotropic displacement parameter set to 1.2 times of the Ueq of the parent atom.
As part of studies on the substituent effects on the structures and other aspects of N-(aryl)-amides (Gowda et al., 2001; Kumar et al., 2012: Shahwar et al., 2012); N-(aryl)-methanesulfonamides (Gowda et al., 2007) and N-chloroarylsulfonamides (Gowda & Ramachandra, 1989; Shetty & Gowda, 2004), in the present work, the
of 3-acetyl-1-(2,3-dichlorophenyl)thiourea has been determined (Fig. 1).The ═S and the C═O are also anti to each other and both the bonds are anti to the adjacent N—H bonds, similar to the anti conformation observed in 3-acetyl-1-(2,3-dimethylphenyl)thiourea (I)(Kumar et al., 2012). The N—H bond adjacent to the 2,3-dichlorophenyl ring is syn to the ortho- and meta-Cl atoms in one of the molecules and anti in the other molecule, compared to the anti conformation observed with respect to the ortho- and meta-methyl groups in the 2,3-dimethylphenyl ring of (I).
of the structure contains two molecules. The conformation of the two N—H bonds are anti to each other. Furthermore, the conformations of the amide CThe side chains are oriented themselves with respect to the 2,3-dichlorophenyl rings with the torsion angles, C2—C1—N1—C7 = 116.47 (26)° and C6—C1—N1—C7 = -65.77 (33)° in molecule 1 and C11—C10—N3—C16 = 129.96 (25)° and C15—C10—N3—C16 = -53.71 (35)° in molecule 2 of the title compound, compared to the torsion angles of C2—C1—N1—C7 = 83.59 (47)° and C6—C1—N1—C7 = -99.89 (44)° for in (I). The dihedral angles between the phenyl rings and the side chains are 62.5 (1)° and 51.3 (1)°, in the two molecules, compared to the value of 81.33 (10)° in (I).
The hydrogen atoms of the NH attached to the phenyl rings and the amide O atoms are involved in the intramolecular hydrogen bonding. In the crystal, the molecules form inversion dimers through pairs of N—H···S intermolecular hydrogen bonds (Table 1, Fig.2).
For studies on the effects of substituents on the structures and other aspects of N-(aryl)-amides, see: Gowda et al. (2001); Kumar et al. (2012); Shahwar et al. (2012). For N-(aryl)-methanesulfonamides, see: Gowda et al. (2007). For N-chloroarylsulfonamides, see: Gowda & Ramachandra (1989), Shetty & Gowda (2004).
Data collection: CrysAlis CCD (Oxford Diffraction, 2009); cell
CrysAlis RED (Oxford Diffraction, 2009); data reduction: CrysAlis RED (Oxford Diffraction, 2009); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).C9H8Cl2N2OS | Z = 4 |
Mr = 263.13 | F(000) = 536 |
Triclinic, P1 | Dx = 1.557 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 7.8475 (6) Å | Cell parameters from 4895 reflections |
b = 9.5987 (7) Å | θ = 2.5–27.7° |
c = 15.141 (1) Å | µ = 0.74 mm−1 |
α = 90.044 (6)° | T = 293 K |
β = 91.099 (6)° | Prism, light yellow |
γ = 100.208 (6)° | 0.46 × 0.44 × 0.36 mm |
V = 1122.24 (14) Å3 |
Oxford Diffraction Xcalibur diffractometer with a Sapphire CCD detector | 4578 independent reflections |
Radiation source: fine-focus sealed tube | 3885 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.011 |
Rotation method data acquisition using ω scans | θmax = 26.4°, θmin = 2.5° |
Absorption correction: multi-scan (CrysAlis RED; Oxford Diffraction, 2009) | h = −9→8 |
Tmin = 0.728, Tmax = 0.777 | k = −11→10 |
7971 measured reflections | l = −18→17 |
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)] = 0.041 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.106 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | w = 1/[σ2(Fo2) + (0.0403P)2 + 0.8845P] where P = (Fo2 + 2Fc2)/3 |
4578 reflections | (Δ/σ)max = 0.002 |
285 parameters | Δρmax = 0.67 e Å−3 |
4 restraints | Δρmin = −0.72 e Å−3 |
C9H8Cl2N2OS | γ = 100.208 (6)° |
Mr = 263.13 | V = 1122.24 (14) Å3 |
Triclinic, P1 | Z = 4 |
a = 7.8475 (6) Å | Mo Kα radiation |
b = 9.5987 (7) Å | µ = 0.74 mm−1 |
c = 15.141 (1) Å | T = 293 K |
α = 90.044 (6)° | 0.46 × 0.44 × 0.36 mm |
β = 91.099 (6)° |
Oxford Diffraction Xcalibur diffractometer with a Sapphire CCD detector | 4578 independent reflections |
Absorption correction: multi-scan (CrysAlis RED; Oxford Diffraction, 2009) | 3885 reflections with I > 2σ(I) |
Tmin = 0.728, Tmax = 0.777 | Rint = 0.011 |
7971 measured reflections |
R[F2 > 2σ(F2)] = 0.041 | 4 restraints |
wR(F2) = 0.106 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | Δρmax = 0.67 e Å−3 |
4578 reflections | Δρmin = −0.72 e Å−3 |
285 parameters |
Experimental. CrysAlis RED (Oxford Diffraction, 2009) Empirical absorption correction using spherical harmonics, implemented in SCALE3 ABSPACK scaling algorithm. |
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 | 0.39378 (10) | 0.64301 (8) | −0.04620 (5) | 0.0675 (2) | |
Cl2 | 0.51017 (13) | 0.81095 (13) | −0.21801 (5) | 0.0956 (3) | |
S1 | 0.86892 (8) | 0.69266 (7) | 0.15722 (5) | 0.05361 (18) | |
O1 | 0.3014 (2) | 0.6735 (2) | 0.21951 (13) | 0.0687 (6) | |
N1 | 0.5647 (3) | 0.7665 (2) | 0.11819 (13) | 0.0457 (5) | |
H1N | 0.458 (2) | 0.754 (3) | 0.1305 (18) | 0.055* | |
N2 | 0.5747 (2) | 0.6306 (2) | 0.24233 (12) | 0.0397 (4) | |
H2N | 0.639 (3) | 0.591 (3) | 0.2760 (15) | 0.048* | |
C1 | 0.6232 (3) | 0.8420 (2) | 0.04055 (15) | 0.0412 (5) | |
C2 | 0.5487 (3) | 0.7949 (3) | −0.04025 (16) | 0.0441 (5) | |
C3 | 0.5999 (3) | 0.8705 (3) | −0.11636 (17) | 0.0526 (6) | |
C4 | 0.7246 (3) | 0.9910 (3) | −0.11191 (19) | 0.0561 (7) | |
H4 | 0.7589 | 1.0412 | −0.1630 | 0.067* | |
C5 | 0.7983 (3) | 1.0369 (3) | −0.0314 (2) | 0.0564 (7) | |
H5 | 0.8827 | 1.1182 | −0.0283 | 0.068* | |
C6 | 0.7479 (3) | 0.9632 (3) | 0.04515 (18) | 0.0512 (6) | |
H6 | 0.7977 | 0.9951 | 0.0993 | 0.061* | |
C7 | 0.6603 (3) | 0.6990 (2) | 0.17092 (14) | 0.0374 (5) | |
C8 | 0.4039 (3) | 0.6220 (3) | 0.26475 (16) | 0.0451 (5) | |
C9 | 0.3545 (3) | 0.5463 (3) | 0.34875 (18) | 0.0607 (7) | |
H9A | 0.2336 | 0.5439 | 0.3587 | 0.073* | |
H9B | 0.4214 | 0.5949 | 0.3969 | 0.073* | |
H9C | 0.3768 | 0.4513 | 0.3449 | 0.073* | |
Cl3 | 0.68592 (11) | −0.06753 (7) | 0.35412 (5) | 0.0693 (2) | |
Cl4 | 0.60530 (13) | −0.20874 (9) | 0.53971 (7) | 0.0884 (3) | |
S2 | 0.78757 (8) | 0.45828 (6) | 0.39216 (4) | 0.04733 (16) | |
O2 | 1.0172 (3) | 0.1780 (2) | 0.20337 (14) | 0.0772 (6) | |
N3 | 0.9002 (3) | 0.2163 (2) | 0.36075 (13) | 0.0453 (5) | |
H3N | 0.932 (3) | 0.169 (3) | 0.3223 (15) | 0.054* | |
N4 | 0.9362 (3) | 0.3818 (2) | 0.24969 (13) | 0.0432 (4) | |
H4N | 0.924 (3) | 0.463 (2) | 0.2336 (17) | 0.052* | |
C10 | 0.8602 (3) | 0.1564 (2) | 0.44498 (15) | 0.0405 (5) | |
C11 | 0.7626 (3) | 0.0208 (2) | 0.44964 (16) | 0.0440 (5) | |
C12 | 0.7286 (3) | −0.0417 (3) | 0.53190 (18) | 0.0531 (6) | |
C13 | 0.7920 (4) | 0.0296 (3) | 0.60792 (18) | 0.0591 (7) | |
H13 | 0.7690 | −0.0126 | 0.6627 | 0.071* | |
C14 | 0.8890 (4) | 0.1627 (3) | 0.60259 (17) | 0.0570 (7) | |
H14 | 0.9317 | 0.2107 | 0.6540 | 0.068* | |
C15 | 0.9241 (3) | 0.2264 (3) | 0.52160 (16) | 0.0494 (6) | |
H15 | 0.9908 | 0.3166 | 0.5187 | 0.059* | |
C16 | 0.8777 (3) | 0.3440 (2) | 0.33372 (14) | 0.0378 (5) | |
C17 | 1.0071 (3) | 0.3013 (3) | 0.18971 (17) | 0.0509 (6) | |
C18 | 1.0707 (4) | 0.3771 (3) | 0.10721 (18) | 0.0633 (7) | |
H18A | 1.0801 | 0.3093 | 0.0618 | 0.076* | |
H18B | 1.1822 | 0.4344 | 0.1187 | 0.076* | |
H18C | 0.9906 | 0.4364 | 0.0882 | 0.076* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cl1 | 0.0655 (4) | 0.0654 (4) | 0.0644 (4) | −0.0075 (3) | −0.0080 (3) | 0.0111 (3) |
Cl2 | 0.0922 (6) | 0.1402 (9) | 0.0462 (4) | −0.0007 (6) | −0.0098 (4) | 0.0234 (5) |
S1 | 0.0414 (3) | 0.0606 (4) | 0.0619 (4) | 0.0158 (3) | 0.0148 (3) | 0.0243 (3) |
O1 | 0.0413 (10) | 0.1009 (16) | 0.0665 (12) | 0.0190 (10) | 0.0075 (9) | 0.0325 (11) |
N1 | 0.0369 (10) | 0.0585 (12) | 0.0425 (11) | 0.0101 (9) | 0.0053 (8) | 0.0153 (9) |
N2 | 0.0370 (10) | 0.0457 (10) | 0.0369 (10) | 0.0085 (8) | 0.0031 (8) | 0.0084 (8) |
C1 | 0.0373 (11) | 0.0450 (12) | 0.0440 (12) | 0.0140 (9) | 0.0063 (9) | 0.0114 (10) |
C2 | 0.0390 (12) | 0.0481 (13) | 0.0469 (13) | 0.0124 (10) | 0.0013 (10) | 0.0109 (10) |
C3 | 0.0494 (14) | 0.0666 (16) | 0.0448 (13) | 0.0184 (12) | 0.0053 (11) | 0.0165 (12) |
C4 | 0.0547 (15) | 0.0618 (16) | 0.0570 (16) | 0.0228 (13) | 0.0183 (12) | 0.0259 (13) |
C5 | 0.0490 (14) | 0.0439 (13) | 0.0766 (19) | 0.0075 (11) | 0.0175 (13) | 0.0136 (12) |
C6 | 0.0496 (14) | 0.0492 (14) | 0.0549 (15) | 0.0084 (11) | 0.0046 (11) | 0.0040 (11) |
C7 | 0.0406 (11) | 0.0359 (11) | 0.0352 (11) | 0.0054 (9) | 0.0019 (9) | −0.0002 (8) |
C8 | 0.0404 (12) | 0.0504 (13) | 0.0435 (13) | 0.0054 (10) | 0.0047 (10) | 0.0039 (10) |
C9 | 0.0482 (14) | 0.0785 (19) | 0.0559 (16) | 0.0111 (13) | 0.0135 (12) | 0.0228 (14) |
Cl3 | 0.0901 (5) | 0.0490 (4) | 0.0630 (4) | −0.0018 (3) | −0.0183 (4) | −0.0066 (3) |
Cl4 | 0.1007 (6) | 0.0566 (4) | 0.0989 (7) | −0.0115 (4) | 0.0078 (5) | 0.0281 (4) |
S2 | 0.0601 (4) | 0.0442 (3) | 0.0409 (3) | 0.0175 (3) | 0.0060 (3) | 0.0027 (2) |
O2 | 0.1154 (18) | 0.0608 (13) | 0.0642 (13) | 0.0367 (12) | 0.0298 (12) | 0.0009 (10) |
N3 | 0.0624 (13) | 0.0365 (10) | 0.0384 (10) | 0.0122 (9) | 0.0063 (9) | −0.0002 (8) |
N4 | 0.0492 (11) | 0.0402 (10) | 0.0407 (10) | 0.0088 (9) | 0.0072 (8) | 0.0048 (8) |
C10 | 0.0456 (12) | 0.0361 (11) | 0.0413 (12) | 0.0115 (9) | 0.0024 (9) | 0.0030 (9) |
C11 | 0.0471 (13) | 0.0383 (12) | 0.0470 (13) | 0.0096 (10) | −0.0026 (10) | 0.0009 (10) |
C12 | 0.0540 (14) | 0.0435 (13) | 0.0625 (16) | 0.0096 (11) | 0.0084 (12) | 0.0135 (11) |
C13 | 0.0730 (18) | 0.0640 (17) | 0.0450 (14) | 0.0233 (14) | 0.0111 (13) | 0.0147 (12) |
C14 | 0.0720 (18) | 0.0622 (16) | 0.0406 (13) | 0.0232 (14) | −0.0027 (12) | −0.0037 (11) |
C15 | 0.0575 (15) | 0.0424 (13) | 0.0480 (14) | 0.0082 (11) | −0.0027 (11) | −0.0019 (10) |
C16 | 0.0360 (11) | 0.0369 (11) | 0.0385 (11) | 0.0015 (9) | −0.0010 (9) | 0.0004 (9) |
C17 | 0.0534 (14) | 0.0553 (15) | 0.0454 (13) | 0.0127 (12) | 0.0066 (11) | −0.0024 (11) |
C18 | 0.0667 (17) | 0.078 (2) | 0.0479 (15) | 0.0187 (15) | 0.0160 (13) | 0.0028 (13) |
Cl1—C2 | 1.726 (2) | Cl3—C11 | 1.719 (2) |
Cl2—C3 | 1.734 (3) | Cl4—C12 | 1.725 (3) |
S1—C7 | 1.666 (2) | S2—C16 | 1.669 (2) |
O1—C8 | 1.217 (3) | O2—C17 | 1.218 (3) |
N1—C7 | 1.330 (3) | N3—C16 | 1.332 (3) |
N1—C1 | 1.422 (3) | N3—C10 | 1.417 (3) |
N1—H1N | 0.846 (17) | N3—H3N | 0.808 (17) |
N2—C8 | 1.378 (3) | N4—C17 | 1.379 (3) |
N2—C7 | 1.387 (3) | N4—C16 | 1.388 (3) |
N2—H2N | 0.843 (16) | N4—H4N | 0.836 (16) |
C1—C6 | 1.382 (3) | C10—C15 | 1.381 (3) |
C1—C2 | 1.386 (3) | C10—C11 | 1.391 (3) |
C2—C3 | 1.390 (3) | C11—C12 | 1.392 (3) |
C3—C4 | 1.378 (4) | C12—C13 | 1.377 (4) |
C4—C5 | 1.377 (4) | C13—C14 | 1.370 (4) |
C4—H4 | 0.9300 | C13—H13 | 0.9300 |
C5—C6 | 1.385 (4) | C14—C15 | 1.381 (4) |
C5—H5 | 0.9300 | C14—H14 | 0.9300 |
C6—H6 | 0.9300 | C15—H15 | 0.9300 |
C8—C9 | 1.489 (3) | C17—C18 | 1.495 (4) |
C9—H9A | 0.9600 | C18—H18A | 0.9600 |
C9—H9B | 0.9600 | C18—H18B | 0.9600 |
C9—H9C | 0.9600 | C18—H18C | 0.9600 |
C7—N1—C1 | 125.50 (19) | C16—N3—C10 | 126.43 (19) |
C7—N1—H1N | 114.5 (19) | C16—N3—H3N | 114 (2) |
C1—N1—H1N | 119.6 (19) | C10—N3—H3N | 120 (2) |
C8—N2—C7 | 128.45 (19) | C17—N4—C16 | 128.0 (2) |
C8—N2—H2N | 117.7 (18) | C17—N4—H4N | 116.8 (19) |
C7—N2—H2N | 113.8 (18) | C16—N4—H4N | 115.1 (19) |
C6—C1—C2 | 120.1 (2) | C15—C10—C11 | 119.8 (2) |
C6—C1—N1 | 121.0 (2) | C15—C10—N3 | 121.4 (2) |
C2—C1—N1 | 118.9 (2) | C11—C10—N3 | 118.8 (2) |
C1—C2—C3 | 119.6 (2) | C10—C11—C12 | 119.3 (2) |
C1—C2—Cl1 | 120.12 (18) | C10—C11—Cl3 | 119.74 (18) |
C3—C2—Cl1 | 120.3 (2) | C12—C11—Cl3 | 120.92 (19) |
C4—C3—C2 | 120.4 (2) | C13—C12—C11 | 120.4 (2) |
C4—C3—Cl2 | 119.6 (2) | C13—C12—Cl4 | 119.3 (2) |
C2—C3—Cl2 | 120.0 (2) | C11—C12—Cl4 | 120.3 (2) |
C5—C4—C3 | 119.6 (2) | C14—C13—C12 | 119.8 (2) |
C5—C4—H4 | 120.2 | C14—C13—H13 | 120.1 |
C3—C4—H4 | 120.2 | C12—C13—H13 | 120.1 |
C4—C5—C6 | 120.6 (2) | C13—C14—C15 | 120.7 (2) |
C4—C5—H5 | 119.7 | C13—C14—H14 | 119.7 |
C6—C5—H5 | 119.7 | C15—C14—H14 | 119.7 |
C1—C6—C5 | 119.7 (3) | C10—C15—C14 | 120.0 (2) |
C1—C6—H6 | 120.2 | C10—C15—H15 | 120.0 |
C5—C6—H6 | 120.2 | C14—C15—H15 | 120.0 |
N1—C7—N2 | 115.39 (19) | N3—C16—N4 | 115.5 (2) |
N1—C7—S1 | 125.13 (17) | N3—C16—S2 | 125.53 (17) |
N2—C7—S1 | 119.48 (16) | N4—C16—S2 | 118.93 (16) |
O1—C8—N2 | 122.4 (2) | O2—C17—N4 | 122.3 (2) |
O1—C8—C9 | 122.6 (2) | O2—C17—C18 | 122.8 (2) |
N2—C8—C9 | 115.0 (2) | N4—C17—C18 | 114.9 (2) |
C8—C9—H9A | 109.5 | C17—C18—H18A | 109.5 |
C8—C9—H9B | 109.5 | C17—C18—H18B | 109.5 |
H9A—C9—H9B | 109.5 | H18A—C18—H18B | 109.5 |
C8—C9—H9C | 109.5 | C17—C18—H18C | 109.5 |
H9A—C9—H9C | 109.5 | H18A—C18—H18C | 109.5 |
H9B—C9—H9C | 109.5 | H18B—C18—H18C | 109.5 |
C7—N1—C1—C6 | −65.8 (3) | C16—N3—C10—C15 | −53.7 (3) |
C7—N1—C1—C2 | 116.5 (3) | C16—N3—C10—C11 | 130.0 (2) |
C6—C1—C2—C3 | −0.1 (3) | C15—C10—C11—C12 | 0.9 (3) |
N1—C1—C2—C3 | 177.6 (2) | N3—C10—C11—C12 | 177.3 (2) |
C6—C1—C2—Cl1 | 179.65 (18) | C15—C10—C11—Cl3 | −178.97 (19) |
N1—C1—C2—Cl1 | −2.6 (3) | N3—C10—C11—Cl3 | −2.6 (3) |
C1—C2—C3—C4 | 0.4 (4) | C10—C11—C12—C13 | −0.4 (4) |
Cl1—C2—C3—C4 | −179.44 (19) | Cl3—C11—C12—C13 | 179.4 (2) |
C1—C2—C3—Cl2 | 178.94 (18) | C10—C11—C12—Cl4 | 179.07 (18) |
Cl1—C2—C3—Cl2 | −0.9 (3) | Cl3—C11—C12—Cl4 | −1.1 (3) |
C2—C3—C4—C5 | −0.2 (4) | C11—C12—C13—C14 | 0.0 (4) |
Cl2—C3—C4—C5 | −178.8 (2) | Cl4—C12—C13—C14 | −179.5 (2) |
C3—C4—C5—C6 | −0.2 (4) | C12—C13—C14—C15 | 0.0 (4) |
C2—C1—C6—C5 | −0.2 (4) | C11—C10—C15—C14 | −0.9 (4) |
N1—C1—C6—C5 | −177.9 (2) | N3—C10—C15—C14 | −177.2 (2) |
C4—C5—C6—C1 | 0.4 (4) | C13—C14—C15—C10 | 0.5 (4) |
C1—N1—C7—N2 | −179.0 (2) | C10—N3—C16—N4 | 176.4 (2) |
C1—N1—C7—S1 | 1.4 (4) | C10—N3—C16—S2 | −3.3 (4) |
C8—N2—C7—N1 | 1.1 (3) | C17—N4—C16—N3 | 3.3 (3) |
C8—N2—C7—S1 | −179.31 (19) | C17—N4—C16—S2 | −177.0 (2) |
C7—N2—C8—O1 | 2.5 (4) | C16—N4—C17—O2 | 4.5 (4) |
C7—N2—C8—C9 | −177.0 (2) | C16—N4—C17—C18 | −175.3 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1N···O1 | 0.85 (2) | 1.91 (2) | 2.625 (3) | 141 (3) |
N2—H2N···S2 | 0.84 (2) | 2.56 (2) | 3.393 (2) | 171 (2) |
N3—H3N···O2 | 0.81 (2) | 1.93 (2) | 2.619 (3) | 143 (3) |
N4—H4N···S1 | 0.84 (2) | 2.59 (2) | 3.418 (2) | 170 (2) |
Experimental details
Crystal data | |
Chemical formula | C9H8Cl2N2OS |
Mr | 263.13 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 293 |
a, b, c (Å) | 7.8475 (6), 9.5987 (7), 15.141 (1) |
α, β, γ (°) | 90.044 (6), 91.099 (6), 100.208 (6) |
V (Å3) | 1122.24 (14) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.74 |
Crystal size (mm) | 0.46 × 0.44 × 0.36 |
Data collection | |
Diffractometer | Oxford Diffraction Xcalibur diffractometer with a Sapphire CCD detector |
Absorption correction | Multi-scan (CrysAlis RED; Oxford Diffraction, 2009) |
Tmin, Tmax | 0.728, 0.777 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 7971, 4578, 3885 |
Rint | 0.011 |
(sin θ/λ)max (Å−1) | 0.625 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.041, 0.106, 1.04 |
No. of reflections | 4578 |
No. of parameters | 285 |
No. of restraints | 4 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.67, −0.72 |
Computer programs: CrysAlis CCD (Oxford Diffraction, 2009), CrysAlis RED (Oxford Diffraction, 2009), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1N···O1 | 0.846 (17) | 1.91 (2) | 2.625 (3) | 141 (3) |
N2—H2N···S2 | 0.843 (16) | 2.559 (17) | 3.393 (2) | 171 (2) |
N3—H3N···O2 | 0.808 (17) | 1.93 (2) | 2.619 (3) | 143 (3) |
N4—H4N···S1 | 0.836 (16) | 2.591 (17) | 3.418 (2) | 170 (2) |
Acknowledgements
BTG thanks the University Grants Commission, Government of India, New Delhi, for a special grant under the UGC-BSR one-time grant to faculty.
References
Gowda, B. T., Foro, S. & Fuess, H. (2007). Acta Cryst. E63, o2570. Web of Science CSD CrossRef IUCr Journals 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.
As part of studies on the substituent effects on the structures and other aspects of N-(aryl)-amides (Gowda et al., 2001; Kumar et al., 2012: Shahwar et al., 2012); N-(aryl)-methanesulfonamides (Gowda et al., 2007) and N-chloroarylsulfonamides (Gowda & Ramachandra, 1989; Shetty & Gowda, 2004), in the present work, the crystal structure of 3-acetyl-1-(2,3-dichlorophenyl)thiourea has been determined (Fig. 1).
The asymmetric unit of the structure contains two molecules. The conformation of the two N—H bonds are anti to each other. Furthermore, the conformations of the amide C═S and the C═O are also anti to each other and both the bonds are anti to the adjacent N—H bonds, similar to the anti conformation observed in 3-acetyl-1-(2,3-dimethylphenyl)thiourea (I)(Kumar et al., 2012). The N—H bond adjacent to the 2,3-dichlorophenyl ring is syn to the ortho- and meta-Cl atoms in one of the molecules and anti in the other molecule, compared to the anti conformation observed with respect to the ortho- and meta-methyl groups in the 2,3-dimethylphenyl ring of (I).
The side chains are oriented themselves with respect to the 2,3-dichlorophenyl rings with the torsion angles, C2—C1—N1—C7 = 116.47 (26)° and C6—C1—N1—C7 = -65.77 (33)° in molecule 1 and C11—C10—N3—C16 = 129.96 (25)° and C15—C10—N3—C16 = -53.71 (35)° in molecule 2 of the title compound, compared to the torsion angles of C2—C1—N1—C7 = 83.59 (47)° and C6—C1—N1—C7 = -99.89 (44)° for in (I). The dihedral angles between the phenyl rings and the side chains are 62.5 (1)° and 51.3 (1)°, in the two molecules, compared to the value of 81.33 (10)° in (I).
The hydrogen atoms of the NH attached to the phenyl rings and the amide O atoms are involved in the intramolecular hydrogen bonding. In the crystal, the molecules form inversion dimers through pairs of N—H···S intermolecular hydrogen bonds (Table 1, Fig.2).