ESR determination of the rate constant for the addition of CpW(CO)3 to spin traps

Conclusions The reaction of CpW(CO)₃]₂ with PhCH₂Cl and the decomposition of CpW(CO)₃Me were studied by ESR spectroscopy using 2,4,6-tri-tert-butyinitrobenzene (BNB) and -phenyl-N-tert-butylnitrone (PNB) as spin traps. The rate constants for the addition of CpW(CO)₃ radicals to the spin traps at 20°C were determined by identification of the intermediate radicals in these reactions: k _ad ^BNB =6.7·10⁵-7.0·10⁵ and k _ad ^PNB =5.8·10⁴-6.1·10⁴ liters/mole · sec.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2631–2633, November, 1984.