A synthetic equivalent for unknown 1,3-zwitterions? – A K/OR phosphinidenoid complex with an additional Si–Cl function

Although the chemistry of frustrated Lewis pairs (FLPs) has seen tremendous developments, investigations on anionic, mono-molecular FLPs are still scarce and 1,3-zwitterions are unknown. Herein, synthesis of a K/OR phosphinidenoid complex bearing a Si–Cl function is reported and, hence, can serve as a synthetic equivalent for a 1,3-zwitterion to allow access to rare and novel heterocyclic P-ligands.