Ab lnitio Investigation of the Hydration of the Tetrahedral Perchiorate, Perbromate, Selenate, Arsenate, and Vanadate Anions.

The geometries, energies, and vibrational frequencies of various isomers of XO4m- (H2O)n, x = Cl, Br, Se, As, V; n = 0-6, m = 1-3 are calculated at various levels up to MP2/6-31+G*. These properties are studied as a function of increasing cluster size. The experimental and theoretical vibrational spectra are compared where available. [ABSTRACT FROM AUTHOR]