Complex formation between antimony trifluoride and alkali-metal sulphates: the X-ray crystal structure of K2SO4·SbF3 and antimony-121 Mössbauer studies of some related compounds

Abstract

The X-ray crystal structure of K₂SO₄·SbF₃ is reported. It crystallizes in the orthorhombic space group P2₁2₁2₁, with a= 5.601(2), b= 9.072(4), c= 14.180(6)Å, and Z= 4 and a final R= 0.035. The antimony environment is that of a distorted octahedron, SbF₃O₂E, where E represents the non-bonding electron pair of Sb^III The ¹²¹Sb Mössbauer data of this and other M₂SO₄·SbF₃ complexes are interpreted in terms of SbX₅E and SbX₆E environments. In all cases the non-bonding electron pair is stereochemically active.