Fluoride crystal structures. Part XXV. Trifluorobis(4-methoxypyridine N-oxide)antimony(III) hydrate

Abstract

The structure of the title compound has been determined by the heavy-atom method from 1 265 reflections, measured with a diffractometer, and refined by full-matrix least-squares methods to R 0.042. Crystals are orthorhombic, space group Pnma, a= 14.91 (2), b= 16.38(2), c= 6.52(1)Å, Z= 4. In the discrete molecules of the complex the antimony atom lies 0.29 Å below the basal plane of a distorted square pyramid. The apical Sb–F distance [1.905(5)Å] is shorter than the basal Sb–F distances [1.968(6)Å]; basal Sb–O(ligand) distances are 2.305(5)Å. There is only weak hydrogen bonding involving the water molecule of crystallisation.