Reactions of a persistent phosphinyl radical/diphosphine with heteroallenes

The persistent phosphinyl radical, (H2C)2(NDipp)2P˙, formed upon dissolution from the homolytic cleavage of the P–P bond in the diphosphane [(H2C)2(NDipp)2P]2, was reacted with carbon disulfide, phenyl isocyanate, and phenyl isothiocyanate. The phosphinyl fragments add across the CS or CO double bond to give neutral, diamagnetic species.