Electron Transfer Oxidation Properties of Vitamin B12 Model Complexes.
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Accession number;99A0308727
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| Title;Electron Transfer Oxidation Properties of Vitamin B12 Model Complexes. |
| Author;
OHKUBO K
(Osaka Univ., Osaka, Jpn)
SUENOBU T
(Osaka Univ., Osaka, Jpn)
ITOH S
(Osaka Univ., Osaka, Jpn)
FUKUZUMI S
(Osaka Univ., Osaka, Jpn)
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Journal Title;Abstr Symp Organomet Chem Jpn
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Journal Code:L0853A
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ISSN:
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VOL.45th;NO.;PAGE.68-69(1998)
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| Figure&Table&Reference; |
| Pub. Country;Japan |
| Language;English |
| Abstract;The electron transfer oxidation and subsequent cobalt-carbon bond dissociation of vitamin B12 model complexes were investigated using cobaloximes, (CH)2Co(R)(L), where R=Me,Et,Ph, and PhCH2, L=a substituted pyridine, and DH=dimethylglyoxime as the B12 model complexes and [Fe(bpy)3](PF6)3(pby=2,2'-bipyridine) as an oxidant. A comparison of cobalt-carbon bond dissociation enthalpies and entropies of [(DH)2CoIV(R)(L)]+ with those of (DH)2CoIII(R)(L) reveals that the cobalt(IV)-carbon bond is significantly weaker than the corresponding cobalt(III)-carbon bond. (author abst.) |
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