Reactions of bis(hexamethylbenzene)iron(0) with carbon monoxide and with unsaturated hydrocarbons

摘要: Abstract Thermal decomposition of bis(hexamethylbenzene)iron(0) in the presence carbon monoxide yields a novel carbonyl iron complex, [C6(CH3)6]Fe(CO)2. The cyclohexadiene complex [C6(CH3)6]Fe(C6H8) is obtained from reaction with either 1,3-cyclohexadiene or benzene, and yield much greater hydrogen gas. Interaction bis-(hexamethylbenzene)iron(0) 2-butyne induces catalytic cyclotrimerization to give more hexamethylbenzene. Kinetic isotope distribution studies indicate that primary step these reactions not direct loss one ring ligand, but rather an insertion center into ligand methyl CH bonds, leading benzyl hydride species. Mechanisms for subsequent this species are proposed.