Esr spectral determination of the relative rate constants for the abstraction of halogen by M(CO)4L species (L=CO,PPh3; M=Cr,Mo, W)

Conclusion The rate constants for the abstraction of bromine from PhCH₂Br and of chlorine from CCl₄ by M(CO)₅ and M(CO)₄PPh₃ species (M=Cr, Mo, and W) are two orders of magnitude greater than the rate constants for chlorine abstraction from PhCH₂Cl; the difference in the rates of chlorine abstraction from CCl₄ and C₂Cl₆ by these species is within an order of magnitude.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 5, pp. 1149–1151, May, 1987.