Insecticides. Part V. Crystal structures of β-(eeeeee)-1,2,3,4,5,6-hexachlorocyclohexane and γ-(aaaeee)-1,2,3,4,5,6-hexachlorocyclohexane (lindane)(redeterminations)

Abstract

The crystal structure of β-1,2,3,4,5,6-hexachlorocyclohexane was redetermined from three-dimensional visually estimated data (285 reflections). Crystals are cubic, space group Pa3, with Z= 4, a= 1 008(1) pm. The structure was refined by least squares to R 0.108. The crystal structure of the γ-isomer was redetermined from three-dimensional diffractometer data (995 reflections). Crystals are monoclinic, space group P2₁/c, with Z= 4, a= 850.2(1), b= 1 025.1(1), c= 1 391.4(2) pm, β= 121.26 (1)°. The structure was refined by least-squares to R 0.045. The determinations reconfirmed the assignments of (eeeeee) to the β- and (aaaeee) to the γ-isomer.