Abstract
Solvent effects on the P → O and [p → 0]G absorptions in organophosphorus compounds of the type (GO)3P → O, (GO)3G'P→ O, [(GO)G'PO(OH)]2, [(GO)3PO(OH)]2, and G3P → O are described, where G is an alkyl or aryl group. The unassociated phosphoryl dipoles are affected by solvents in a manner similar to the carbonyl dipole The consequences of the solvent effects on the physical properties of these compounds are discussed.