Abstract:
The methods of synthesis, structure, physicochemical properties, and reactivity of transition metal complexes containing unsaturated carbene ligands (vinylidenes, allenylidenes, and heterocumulenylidenes) are examined. Attention is concentrated on heterometallic compounds. The prospects for the development of the chemistry of unsaturated carbene complexes and their use in organic and organometallic synthesis are discussed. The bibliography includes 280 references.