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The Reaction of Cobaloximes with Hydrogen: Products and Thermodynamics

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journal contribution
posted on 17.12.2014, 00:00 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.

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