Bis(dimethylammonium) Pentachloroantimonate(III), on the Deformation of the Octahedral Coordination of Sb^III

The structure of the title compound, [NH₂(CH₃)₂]₂SbCl₅, was determined at 295 and 85 K. It consists of polymeric (SbCl₅^2-)_n chains composed of deformed SbCl₆^3- octahedra connected by corners and dimethylammonium cations. The temperature dependence of the Sb-Cl bond lengths is discussed. It is argued that the deformation of the octahedral coordination of the Sb^III atom is caused by electrostatic interaction/hydrogen bonds.

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