Dimethyltin Dichloride-Dibenzyl Sulfoxide, a Compound Crystallizing with Seven Molecules in the Asymmetric Unit

Dimethyltin dichloride-dibenzyl sulfoxide, ((CH3)2SnCl2·O=S(CH2C6H5)2), crystallizes in the orthorhombic space group P212121 with a superstructure of dimensions a =11.9290(1), b = 19.50490(1), c = 55.7390(6)(A); Z=8. The geometry of the five-coordinated tinatom in each of the seven independent adduct molecules is a square pyramid that is displaced towards a cis-trigonal bipyramid; the extent of displacement along the Berry pseudorotation pathway ranges from 20 to 45%.