Development of Metal Complexes Equipped with Structurally Flexible Carbenes

We herein summarize our recent results on the design and application of metal complexes that bear N-phosphine-oxide-substituted imidazolylidenes (PoxIms), in which volume shape reaction space around carbene atoms can be drastically changed via rotation N-phosphinoyl groups; this phenomenon is discussed detail based experimental theoretical results. also discuss PoxIms to implement frustration revival strategy synthesis external stimuli-responsive Lewis acid–base adducts are comprised B(C6F5)3, as well phosphinoylation CO2 carbonyl compounds. The presented Account have expanded frontiers multifunctional N-heterocyclic carbenes, had previously been employed mainly multidentate ligands for complexes. bearing change spatial environment through their groups. These carbenes beyond traditional use