Monoclinic polymorph of chlorido-(dimethyl sulfoxide-κO )tri-phenyl-tin(IV)

Acta Crystallographica. Section E, Crystallographic Communications
Serigne Fallou PouyeSylvain Bernès

Abstract

The crystal structure of the title tin complex, [Sn(C6H5)3Cl(C2H6OS)], (I), has been reported with one mol-ecule in the asymmetric unit in an ortho-rhom-bic cell [Kumar et al. (2009 ▸). Acta Cryst. E65, m1602-m1603]. While using SnPh3Cl as a starting material for a reaction for which the products were recrystallized over a very long time (six months) from dimethyl sulfoxide (DMSO), a new polymorph was obtained for (I), with two independent mol-ecules in the asymmetric unit of a monoclinic cell. The coordination geometry of the Sn centres remains unchanged, with the Cl- ion and the DMSO mol-ecule in the apical positions and the phenyl C atoms in the equatorial positions of a trigonal bipyramid. The main difference between the polymorphs is the relative orientation of the phenyl rings in the equatorial plane, reflecting a degree of free rotation of these groups about their Sn-C bonds. In the crystal, mol-ecules are linked into [010] chains mediated by weak C-H⋯O inter-actions.

Methods Mentioned

BETA
X-ray

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