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The Reaction of Cobaloximes with Hydrogen: Products and Thermodynamics
journal contributionposted on 2014-12-17, 00:00 authored by Deven P. Estes, David C. Grills, Jack R. Norton
A cobalt hydride has been proposed as an intermediate in many reactions of the Co(dmgBF2)2L2 system, but its observation has proven difficult. We have observed the UV–vis spectra of Co(dmgBF2)2L2 (1) in CH3CN under hydrogen pressures of up to 70 atm. A Co(I) compound (6a) with an exchangeable proton is eventually formed. We have determined the bond dissociation free energy and pKa of the new O–H bond in 6a to be 50.5 kcal/mol and 13.4, respectively, in CH3CN, matching previous reports.