Three substituted (E)-3-aryl-2-(thienyl)-acrylonitriles: Isolated molecules, simple hydrogen-bonded chains and hydrogen-bonded sheets

Abstract

The structure of (E)-2-(2-thienyl)-3-(3,4,5-trimethoxyphenyl)- acrylonitrile, C16H15NO3S, contains no direction-specific intermolecular interactions. The molecules of (E)-3-(4-bromophenyl)-2-(2-thienyl)acrylonitrile, C13H 8BrNS, exhibit orientational disorder of the thienyl fragment, and the molecules are linked into simple C(5) chains by a single C-H⋯N hydrogen bond. In (E)-3-phenyl-2-(3-thienyl)acrylonitrile, C13H 9NS, the molecules are linked into sheets by a combination of one C-H⋯N hydrogen bond and one C-H⋯π(arene) hydrogen bond. © 2006 International Union of Crystallography.