The utility of free-radical addition reactions of compounds containing PH bonds to olefins in the preparation of organophosphorus compounds is well recognized. 2 However, since the initial description of the freeradical addition of phosphorus trichloride to l-octene13 little work has appeared on the potentially useful freeradical addition of P-halo compounds to olefins. A recent paper4 describes the photochemical initiation of addition of phosphorus ...