Features of the co-ordination chemistry of B-metals. Part I. Antimony(III) fluoride complexes

Abstract

Discrete mononuclear units have been characterized in the form of the matrix-isolated SbF₃ molecule and of the anion SbF₄^–, identified for the first time, in association with appropriately bulky cations in the solid phase and in solution in organic solvents; the vibrational spectra of the SbF₄^– anion imply C_2v symmetry. Vibrational spectroscopy has also been applied, in conjunction with earlier X-ray analysis, to the characterization (i) of polynuclear anions as in the solid complexes M^ISbF₄(M^I= Na, K, Cs, or NH₄) and CsSb₂F₇ and (ii) of the SbF₅^2– ion in different environments.