Home Crystal structure of N-(3-chlorophenyl)(propan-2-yloxy)carbothioamide, C10H12ClNOS
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Crystal structure of N-(3-chlorophenyl)(propan-2-yloxy)carbothioamide, C10H12ClNOS

  • Chien Ing Yeo and Edward R.T. Tiekink EMAIL logo
Published/Copyright: April 6, 2018

Abstract

C10H12ClNOS, monoclinic, P21/n (no. 14), a = 13.2003(12) Å, b = 6.0448(6) Å, c = 13.9403(13) Å, β = 101.9180(10)°, V = 1088.36(18) Å3, Z = 4, Rgt(F) = 0.0291, wRref(F2) = 0.0807, T = 100(2) K.

CCDC no.:: 1830415

The asymmetric unit of the title crystal structure is shown in the figure. Tables 1 and 2 contain details of the measurement method and a list of the atoms including atomic coordinates and displacement parameters.

Table 1:

Data collection and handling.

Crystal:Colourless block
Size:0.25 × 0.09 × 0.06 mm
Wavelength:Mo Kα radiation (0.71073 Å)
μ:5.1 cm−1
Diffractometer, scan mode:Bruker SMART APEX, ω scans
2θmax, completeness:55°, >99%
N(hkl)measured, N(hkl)unique, Rint:12986, 2497, 0.033
Criterion for Iobs, N(hkl)gt:Iobs > 2 σ(Iobs), 2196
N(param)refined:132
Programs:Bruker programs [1, 2] , SHELX [3, 4] , ORTEP [5]
Table 2:

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2).

AtomxyzUiso*/Ueq
Cl10.45970(3)0.03216(7)0.10488(3)0.02439(11)
S10.38771(3)0.47645(6)0.59269(3)0.01761(11)
O10.29120(7)0.10134(17)0.52802(7)0.0161(2)
N10.40998(9)0.2174(2)0.44643(8)0.0154(2)
H1N0.4559(11)0.318(2)0.4410(12)0.018*
C10.36131(11)0.2534(2)0.52058(10)0.0143(3)
C20.39332(10)0.0544(2)0.37143(10)0.0139(3)
C30.42858(10)0.1094(2)0.28661(10)0.0155(3)
H30.46050.24850.28140.019*
C40.41646(11)−0.0411(2)0.21042(10)0.0165(3)
C50.36997(11)−0.2446(2)0.21476(10)0.0174(3)
H50.3616−0.34520.16140.021*
C60.33581(11)−0.2972(2)0.29969(10)0.0172(3)
H60.3040−0.43670.30430.021*
C70.34692(10)−0.1511(2)0.37813(10)0.0151(3)
H70.3232−0.19060.43570.018*
C80.23245(11)0.1151(2)0.60690(10)0.0161(3)
H80.21110.27150.61490.019*
C90.13810(12)−0.0270(3)0.57210(12)0.0254(3)
H9A0.09890.03040.50960.038*
H9B0.0944−0.02450.62100.038*
H9C0.1597−0.17940.56310.038*
C100.29920(12)0.0325(2)0.70175(11)0.0194(3)
H10A0.35900.13060.72130.029*
H10B0.3232−0.11770.69220.029*
H10C0.25850.03120.75310.029*

Source of materials

3-Chlorophenyl isothiocyanate (Sigma Aldrich; 2.5 mmol, 0.33 mL) was added to NaOH (Merck; 2.5 mmol, 0.10 g) in iPrOH (Merck; 5 mL) and the mixture was left for stirring at room temperature for 2 h. This was followed by the addition of excess 5 M HCl solution. The resulting mixture was stirred for another 1.5 h. The final product was extracted with chloroform (Merck; 20 mL) and left for evaporation at room temperature, yielding colourless crystals after 5 weeks. M.p. (Krüss KSP1N): 347–349 K. IR (Perkin Elmer Spectrum 400 FT Mid-IR/Far-IR; cm−1): 3220 (s) ν(N—H), 1478 (s) ν(C—N), 1203 (s) ν(C=S), 1095 (s) ν(C—O). Elem. Anal. (Perkin Elmer PE 2400 CHN): Calc. for C10H12ClNOS: C, 52.04; H, 5.14; N, 6.33%. Found: 52.28; H, 5.27; N, 6.10%.

Experimental details

The C-bound H atoms were geometrically placed (C—H = 0.95–1.00 Å) and refined as riding with Uiso(H) = 1.2–1.5 Ueq(C). The N-bound H-atom was located in a difference Fourier map but was refined with a distance restraint of N—H = 0.88 + −0.01 Å, and with Uiso(H) set to 1.2 Ueq(N). Owing to poor agreement, a reflection, i.e. (10 0 8), was omitted from the final cycles of refinement.

Comment

The motivation for the preparation of the title compound was the observation that alkoxythiocarbamides, i.e. ROC(=S)N(H)R′ for R/R′ = alkyl/aryl, when complexed to phosphanegold(I), generate bioactive compounds in the context of both cancer [6] and bacterial infection [7], and the structure determination follows on-going systematic structural investigations in this area [8, 9] .

The molecular structure of iPrOC(=S)N(H)C6H4Cl3 is shown in the Figure (70% displacement ellipsoids) and comprises a planar CNOS core [r.m.s. deviation = 0.0052 Å] which forms a dihedral angle of 20.50(8)° with the N-bound 3-chlorophenyl group, there being a twist about the N1—C2 bond; the C1—N1—C2—C3 torsion angle is 156.74(14)°. The thioamide-N—H and thione-S atoms are syn, and to a first approximation, the chlorine atom lies to the same side of the molecule as does the thione-S atom.

In the molecular packing, the syn-disposition of the thioamide-N—H and thione-S atoms facilitates the formation of thioamide-N—H⋯S(thione) hydrogen bonds and eight-membered {⋯HNCS}2 synthons [N1—H1n⋯S1i: 2.535(14) Å and 164.6(12)° for symmetry operation i: 1 − x, 1 − y, 1 − z]. Interestingly, weak Cl⋯Cl halogen bonding is also apparent [Cl1⋯Cl1ii = 3.3345(7) Å for symmetry operation ii: −x, −y, 1 − z]. These serve to link the dimeric aggregates into supramolecular chains parallel to [1̅ 1 5].

While there are no direct precedents for the title compound in the crystallographic literature [8, 9] , the structure of the ethoxy derivative has been reported recently [10]. In the latter, the same syn disposition of the thioamide-N—H and thione-S atoms in the molecular structure and supramolecular {⋯HNCS}2 synthon in the molecular packing are observed. The key difference in structures is found in the relative dispositions of the thione-S and chloro atoms which lie to opposite sides in the molecule of the ethoxy derivative as opposed to the conformation observed in the title compound.

Acknowledgements

The University of Malaya’s X-ray laboratory is thanked for the data collection. Sunway University is thanked for support of biological and crystal engineering studies of metal alkoxycarbothioamides.

References

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Yeo, C. I.; Sim, J.-H.; Khoo, C.-H.; Goh, Z.-J.; Ang, K.-P.; Cheah, Y.-K.; Fairuz, Z. A.; Halim, S. N. B. A.; Ng, S. W.; Seng, H.-L.; Tiekink, E. R. T.: Pathogenic Gram-positive bacteria are highly sensitive to triphenylphosphanegold(O-alkylthiocarbamates), Ph3PAu[SC(OR)=N(p-tolyl)] (R = Me, Et and iPr). Gold Bull. 46 (2013) 145–152.10.1007/s13404-013-0091-zSearch in Google Scholar

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Received: 2017-12-16
Accepted: 2018-3-16
Published Online: 2018-4-6
Published in Print: 2018-5-24

©2018 Chien Ing Yeo et al., published by De Gruyter, Berlin/Boston

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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