Home Crystal structure of N-(3-chlorophenyl)ethoxycarbothioamide, C9H10ClNOS
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Crystal structure of N-(3-chlorophenyl)ethoxycarbothioamide, C9H10ClNOS

  • Yee Seng Tan , Chien Ing Yeo and Edward R.T. Tiekink EMAIL logo
Published/Copyright: March 30, 2018

Abstract

C9H10ClNOS, monoclinic, C2/c (no. 15), a = 18.8783(6) Å, b = 4.5518(2) Å, c = 23.6739(8) Å, β = 91.501(4)°, V = 2033.61(13) Å3, Z = 8, Rgt(F) = 0.033, wRref(F2) = 0.082, T = 100(2) K.

CCDC no.:: 1830621

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 prism
Size:0.30 × 0.22 × 0.05 mm
Wavelength:Mo Kα radiation (0.71073 Å)
μ:5.4 cm−1
Diffractometer, scan mode:Bruker SMART APEX, ω scans
2θmax, completeness:55°, >99%
N(hkl)measured, N(hkl)unique, Rint:9015, 2327, 0.035
Criterion for Iobs, N(hkl)gt:Iobs > 2 σ(Iobs), 2015
N(param)refined:122
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
Cl10.39796(3)0.55128(12)0.24380(2)0.03764(15)
S10.36135(2)−0.36422(9)−0.00973(2)0.01921(12)
O10.42262(6)−0.0977(2)0.07864(5)0.0194(2)
N10.30855(7)0.0069(3)0.06370(6)0.0163(3)
H1N0.2704(7)−0.028(4)0.0438(7)0.020*
C10.36499(8)−0.1440(3)0.04656(6)0.0157(3)
C20.30022(8)0.2121(3)0.10787(6)0.0163(3)
C30.35058(8)0.2705(4)0.15030(7)0.0199(3)
H30.39480.17110.15130.024*
C40.33465(9)0.4769(4)0.19103(7)0.0218(4)
C50.27084(9)0.6245(4)0.19176(7)0.0220(3)
H50.26140.76480.22030.026*
C60.22107(9)0.5617(4)0.14962(7)0.0223(4)
H60.17650.65860.14940.027*
C70.23542(8)0.3593(3)0.10777(7)0.0200(3)
H70.20090.32060.07880.024*
C80.48604(8)−0.2722(4)0.06945(7)0.0223(4)
H2A0.5083−0.21450.03370.027*
H2B0.4742−0.48390.06760.027*
C90.53472(9)−0.2092(5)0.11901(8)0.0339(5)
H3A0.5780−0.32610.11590.051*
H3B0.5111−0.26050.15400.051*

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 EtOH (Merck; 3 mL) and the mixture was stirred at room temperature for 2 h, 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; 15 mL) and left for evaporation at room temperature, yielding colourless crystals after 2 weeks. M.p. (Krüss KSP1N): 349−350 K. IR (Perkin Elmer Spectrum 400 F T Mid-IR/Far-IR; cm−1): 3248 (s) ν(N—H), 1476 (s) ν(C—N), 1199 (s) ν(C=S), 1040 (s) ν(C—O). Elem. Anal. (Perkin Elmer PE 2400 CHN): Calc. for C9H10ClNOS: C, 50.11; H, 4.67; N, 6.49%. Found: C, 50.21; H, 4.55; N, 6.69%.

Experimental details

The C-bound H atoms were geometrically placed (C—H = 0.95−0.99 Å) and refined as riding with Uiso(H) = 1.2−1.5 Ueq(C). The N-bound H-atoms were located in a difference Fourier map but were 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, two reflections, i.e. (2 0 0) and (0 0 2), were omitted from the final cycles of refinement, presumably owing to interference from the beam-stop.

Comment

The structural landscape of molecules of the general formula ROC(=S)N(H)R′, for R, R′ = alkyl/aryl, has been summarized recently [6]. The overwhelming majority of structures, including a more recently reported derivative [7], share common features such as a syn-disposition of the thioamide-N—H and thione-S atoms [6, 7] with the exceptions, i.e. with anti-dispositions of these atoms, arising owing to the dictates of thioamide-N—H⋯O, N hydrogen bonding, as the O– and/or N-bound substituents carry good oxygen or nitrogen hydrogen bond acceptors [6]. In continuation of these studies, the title compound EtOC(=S)N(H)(3-ClPh) was investigated by X-ray crystallography.

The molecular structure is shown in the Figure (50% displacement ellipsoids) and this features the anticipated syn-disposition of the thioamide-N—H and thione-S atoms. The central CNOS chromophore is planar and forms a dihedral angle of 7.94(9)° with the N-bound 3-chlorophenyl ring. The whole molecule is practically planar with the r.m.s. for the 13 fitted non-hydrogen atoms being 0.0594 Å with maximum deviations of 0.1186(12) and 0.0973(12) Å for the O1 and N1 atoms, respectively. Overall, the molecule has a U-shape as the ethoxy and phenyl-chloro groups lie to the same side of the molecule.

In the molecular packing, the syn-disposition of the thioamide-N—H and thione-S atoms facilitates the formation of thioamide-NH⋯S(thione) hydrogen bonds between centrosymmetrically related molecules and therefore, eight-membered thioamide synthons {⋯HNCS}2; N1—H1n⋯S1i: 2.641(14) Å and 164.7(14)° for symmetry operation i: 1/2 − x, −1/2 − y, − z. Globally, in the crystal, dimeric aggregates stack in columns parallel to the b axis.

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

Krause, L.; Herbst-Irmer, R.; Sheldrick, G. M.; Stalke, D.: Comparison of silver and molybdenum microfocus X-ray sources for single-crystal structure determination. J. Appl. Cryst. 48 (2015) 3–10.10.1107/S1600576714022985Search in Google Scholar PubMed PubMed Central

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Sheldrick, G. M.: A short history of SHELX. Acta Crystallogr. A71 (2015) 3–8.10.1107/S2053273314026370Search in Google Scholar PubMed PubMed Central

Sheldrick, G. M.: Crystal structure refinement with SHELXL. Acta Crystallogr. C71 (2015) 3–8.10.1107/S2053229614024218Search in Google Scholar PubMed PubMed Central

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Yeo, C. I.; Tiekink, E. R. T.: Crystal structure of N-(2-methylphenyl)ethoxycarbothioamide, C10H13NOS. Z. Kristallogr. – NCS 233 (2018) 299–301.10.1515/ncrs-2017-0295Search in Google Scholar

Received: 2017-12-12
Accepted: 2018-3-18
Published Online: 2018-3-30
Published in Print: 2018-5-24

©2018 Yee Seng Tan 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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