Resolvable polymorphism in an intergrowth of two modifications of tris(diethyldithiocarbamato)antimony

Tris(diethyldithiocarbamato- κ S)antimony(III), [Sb(C5H10NS2)3], is tentatively presumed to comprise a triclinic and a monoclinic polymorph intergrown into each other. The geometry in the triclinic phase is a ψ -capped octahedron and that in the monoclinic phase is a ψ -pentagonal bipyramid. The study also identifies the polyhedral symbols for a reported pair of polymorphs of another SbIII coordination compound, as well as for those of published polymorphic modifications of other BiIII and PbII coordination compounds; the symbols in the pair differ in most of these examples. When differentiating related structures of such classes of coordination compounds, lone-pair stereochemistry may be another informative variable, as stereochemical activity is not always apparent from bond distances and angles only.

Source: Acta Crystallographica Section C - September 10, 2021 Category: Chemistry Authors: Ng, S.W. Tags: allotwin antimony(III) dithiocarbamate lone-pair stereochemistry bismuth(III) lead(II) polymorph crystal structure research papers Source Type: research