Transition metal complexes with terminal carbyne ligands

摘要: Publisher Summary This chapter discusses the chemistry of molecular carbyne complexes; there is also much interest in them as models for species that are possibly present on metal surfaces catalytic reactions. Surfacebound methine (CH) a proposed intermediate Fischer–Tropsch synthesis, and alkylidyne groups suggested intermediates heterogeneously catalyzed alkyne metathesis X-Ray structure determinations complexes show they have very short metal–carbon bond lengths consistent with triple bond. In certain cases, ∞-protons an alkylidene ligand may be abstracted by base to give compounds. Addition electrophiles terminal isonitrile (CNR) ligands gives aminocarbyne analogous reaction thiocarbonyl (CS) thiocarbynes. Fischer Himmelreich reported abstraction oxygen from anionic carbamoyl compound SOCl 2 compound. Reactions cationic compounds nucleophiles proceed exclusively nucleophilic attack at carbon atom, thus providing synthetically useful route carbene complexes. The field transition-metal has matured point where great deal known about structure, bonding, reactivity ligand.