English Journal

Methylcobalamin's full- vs. "half"-strength cobalt-carbon sigma bonds and bond dissociation enthalpies: A >10(15) Co-CH3 homolysis rate enhancement following one-antibonding-electron reduction of methlycobalamin.

Martin BD1, Finke RG.
Journal of the American Chemical Society.J Am Chem Soc.1992 Jan;114(2):585-92. doi: 10.1021/ja00028a027.
Methylcobalamin (MeCbl, MeB12) thermolyzed in ethylene glycol from 120 to 141 degrees C with 2,2,6,6-tetramethylpiperidinyl-1-oxy (TEMPO) as a Me(.) trap gives the homolysis products Co(II)B12 and TEMPO-Me quantitatively. The 5,6-dimethylbenzimidazole axial-base-off-base-on equilibrium in ethylene g
PMID 20000783

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