The crystal structure of the 1 : 1 adduct of antimony trifluoride and antimony pentafluoride

Abstract

A single-crystal X-ray diffraction study of the compound (SbF₄)₄ shows that it is monoclinic with the following unit-cell dimensions: a= 9.32(1), b= 12.07(1), c= 11.60(1)Å, β= 107.1(3)°, space group P2₁/c, and Z= 4. Refinement by full-matrix least-squares methods of all parameters with anisotroptc temperature factors on the heavy atoms gave an R of 0.071 for 2 048 observed reflections. The asymmetric unit consists of an [Sb₂F₄]²⁺ cation and two [SbF₆]^– anions. When the longer Sb^III–F contacts are considered then the structure must be described as an infinite three-dimensional polymer.