Bonding and structure of diphenyltellurium(IV) difluoride

Abstract

The structure analysis of the title compound reveals a ψ-trigonal-bipyramidal arrangement of ligands around tellurium with only very weak interactions between tellurium and fluorine atoms in adjacent molecules. The ¹²⁵Te Mössbauer parameters indicate different bonding properties in the difluoride as compared with other diaryltellurium(IV) dihalides. The crystal structure has been determined by the heavy-atom method from X-ray diffractometer data and refined by full-matrix least-squares methods to R= 0.024 for 1 184 reflections. Crystals are monoclinic, space group C2/c, with a= 14.67(1), b= 9.61(1), c= 7.97(1)Å, β= 101.3(2)°, and Z= 4.