Issue 7, 2007

Principles of crystal packing in O-isopropyl-N-aryl-thiocarbamides: iPrOC([double bond, length as m-dash]S)N(H)C6H4-4-Y: Y = H, Cl, and Me

Abstract

Crystallographic analysis shows no significant influence is exerted by the nature of Y upon the molecular parameters of the central O–C([double bond, length as m-dash]S)–N(H) chromophore in the structures of iPrOC([double bond, length as m-dash]S)N(H)C6H4-4-Y, for Y = H (1), Cl (2), and Me (3); this is verified by a theoretical study. The crystal structures each feature dimeric aggregates as a result of the uniform formation of the {⋯H–N–C[double bond, length as m-dash]S}2, thioamide, synthon. An analysis of the crystal structures shows that the substitution of the chloride atom in (2) by a methyl group, leading to (3), has a profound influence on the crystal packing owing to the participation of the chloride atom in structure directing C–H⋯Cl interactions that link the dimeric aggregates into a double layer structure. In the structures of (1) and (3), C–H⋯S interactions serve to connect molecules into columnar and layer structures, respectively, with weak C–H⋯O (and π⋯π interactions in (3)) further reinforcing the crystal packing.

Graphical abstract: Principles of crystal packing in O-isopropyl-N-aryl-thiocarbamides: iPrOC( [[double bond, length as m-dash]] S)N(H)C6H4-4-Y: Y = H, Cl, and Me

Supplementary files

Article information

Article type
Paper
Submitted
31 Jan 2007
Accepted
20 Mar 2007
First published
30 Mar 2007

CrystEngComm, 2007,9, 574-581

Principles of crystal packing in O-isopropyl-N-aryl-thiocarbamides: iPrOC([double bond, length as m-dash]S)N(H)C6H4-4-Y: Y = H, Cl, and Me

F. S. Kuan, F. Mohr, P. P. Tadbuppa and E. R. T. Tiekink, CrystEngComm, 2007, 9, 574 DOI: 10.1039/B701489A

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