Chlorine and hydrogen transfer by metal carbonyl intermediates

The reduction of 1,1,1,5-tetrachloropentane by toluene in the presence of the Fe(CO)₅ or M(CO)₆ (M=Cr, Mo, W) in conjunction with triphenylphosphine was investigated. It was shown that the chlorine-containing metal carbonyl intermediates formed in the process take part in the transfer of the chlorine atom to the benzyl radicals. It was shown that HMn(CO)₅ is not the main intermediate responsible for the transfer of hydrogen by the chloroalkyl radicals, which are formed during the reduction of 1,3,3,5-tetrachloropentane by triethylsilane in the presence of Mn₂(CO)₁₀.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 927–930, April, 1991.