Spectroscopic Investigation of Various Phosphorus-Sulfur Bonds

The results of spectroscopic investigations on phosphorus-sulfur compounds, and particularly the force constants, reveal several factors that decisively influence the bonding. The effects of hybridization, the other bonding partners and their electronegativities, the π-bonding components, and the ionic charge are discussed. It is shown that the P? S bond, unlike the P? O bond, never attains full double bond character, despite its great variability.