Solvent Effects on the Infrared Spectra of Organophosphorus Compounds

Solvent effects on the P → O and [p → 0]G absorptions in organophosphorus compounds of the type (GO) 3 P → O, (GO) 3 G'P→ O, [(GO)G'PO(OH)] 2 , [(GO) 3 PO(OH)] 2 , and G 3 P → 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.