Vibration spectra and structure of some pentafluorotellurate(IV) complexes

Abstract

Pentafluorotellurate complexes, MTeF₅, where M = K, Rb, Cs, NH₄, and C₅H₅NH, have been prepared, and their infrared and Raman spectra have been recorded. Molecular weight and conductivity measurements indicate that the pyridinium complex is a 1 : 1 electrolyte in solution, and the vibration spectra show that the discrete TeF₅^– ion persists in the solid phase. Detailed assignments of the infrared and Raman spectra of the crystalline complexes suggest a square-pyramidal (C_4r) structure for the pentafluorotellurate(IV) ion.