Bis-Phosphorus(V) Stabilized Carbene Complexes

In the past decade, novel types of carbene complexes have been developed, for which the two substituents at C are P(V) moieties. Different strategies have been devised, relying on the use of the isolable geminal dianion, the monoanion or the neutral ligands. In the two latter cases, the deprotonation (mono and double respectively) in the coordination sphere, yields the desired carbene complex. In this review, such carbene complexes of groups 2 to 12, as well as Ln and U, are presented.