Summary
Cobalt complexes with a tetradentate equatorial chelating agent (chel) an organic group (R) and a donor solvent molecule (S) in the axial positions of a pseudo-octahedral structure [RCoIII(chel)S]+,0, undergo reversible one-electron transfers at the D.M.E. in dimethylformamide, yielding organometallic anions by a one-step or two-step reduction when (chel) is a dianion or monoanion respectively. Stability of organometallic anions and mechanism of cleavage of the Co-C bond depend on the nature of R and of (chel). Cleavage yielding carbanions is proposed as model mechanism for the transfer of organic groups from alkylcobalamines.
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Costa, G., Puxeddu, A., Reisenhofer, E. (1971). Electrochemical Model Processes for Reductive Cleavage of the Cobalt-Carbon Bond. In: Milazzo, G., Jones, P.E., Rampazzo, L. (eds) Biological Aspects of Electrochemistry. Experientia Supplementum, vol 18. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-5848-9_18
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