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. 2014 Dec 17;136(50):17362-5.
doi: 10.1021/ja508200g. Epub 2014 Dec 9.

The reaction of cobaloximes with hydrogen: products and thermodynamics

Deven P Estes  1 , David C Grills, Jack R Norton
Affiliations

The reaction of cobaloximes with hydrogen: products and thermodynamics

Deven P Estes et al. J Am Chem Soc. .

Abstract

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 pK(a) 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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