Bis(1-chloro-2,2,4,4-tetramethyl-3-oxocyclobutan1-yl)pentasulfane: an occupancy modulated structure

摘要

The title compound crystallizes in the space group P2(1) and may be described by a partial ordering of a 1: 1 disordered P2(1)/a parent structure with the c axis halved. The pentasulfane chain completes a full turn of a helix, which gives molecules containing left- or right-handed helices similar spatial requirements and allows them to be interchanged. The structure can be redescribed as containing 0.732 (1) of an ordered P2(1) structure and 0.268 ( 1) of a 1: 1 disordered P2(1)/a structure, implying that 0.134 (1) of the molecule sites contain molecules of the opposite hand to that predicted by an ordered P2(1) structure. It is found that the average molecular position in the asymmetric unit is not the same for each component and that these structural differences must be recognized to obtain a satisfactory refinement.