Confirmation of SF3+ Vibrational Assignments by Raman Spectroscopic Polarization Measurements in HF Solution

Abstract

The vibrational assignments of the trifluorosulfur (IV) cation (SP3+, previously determined from spectra of solids, are confirmed by polarization measurements on solutions of SF3+BF4-, SF3+PF6-, and SF3+AsF6- in anhydrous HF. Techniques and equipment have been developed to obtain Raman spectra of species dissolved in anhydrous hydrogen fluoride. Accurate polarization information can be obtained even though the FEP fluorocarbon plastic used as a container and window material is optically active.