The preparation and reactions of primary phosphine oxides

The preparation of primary phosphine oxides, RP(O)H2, by the controlled oxidation of primary phosphines is described. Some of the properties of these novel oxides are discussed and their reactions with olefins, carbonyl compounds and isocyanates are reported. These reactions lead to various types of symmetrical and unsymmetrical secondary and tertiary phosphine oxides. Polymers are obtained from reactions with a diisocyanate.