Metal-Carbene, -Methylene, -Carbyne and -Methylidyne Complexes

4 Metal-Carbene, -Methylene, -Carbyne and -Methylidyne Complexes 

In addition to complexes containing carbenes bonded to a single metal atom (M=CRR ), complexes are also known where the carbene ligand bridges two metal atoms (M-CRR -M, p-methylenes) similarly there is an extensive chemistry of metal-carbynes (M=CR, with a formal triple bond between the metal and the ligand) and p-methylidynes where the ligand is again 

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