1-Methyl-2,3-dihydro-1H-benzimida-zole-2-selone

Abstract

The title compound C8H8N2Se, is the product of the reaction of 2-chloro-1-methyl-benzimidazole with sodium hydro-selenide. The molecule is almost planar (r.m.s. deviation = 0.041 Å) owing to the presence of the long chain of conjugated bonds (Se=C - NMe - C=C - C=C - C=C - NH). The C=Se bond length [1.838 (2) Å] corresponds well to those found in the close analogs and indicates its pronounced double-bond character. In the crystal, molecules form helicoidal chains along the b axis by means of N - H⋯Se hydrogen bonds. © Mammadova et al. 2012.