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Photolysis of methylcobalamin. Nature of the reactive excited state

URN to cite this document:
urn:nbn:de:bvb:355-epub-230118
Kunkely, Horst ; Vogler, Arnd
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Date of publication of this fulltext: 21 Dec 2011 06:40


Abstract

Photolysis of methylcobalamin (Co(III)corrin(CH3)L + H2O + O2 �> Co(III)(H2O)L + H2CO + OH-) shows a pronounced wave-length dependence. It is suggested that the reactive excited state is of the ligand-to-ligand charge transfer (LLCT) type and involves the promotion of an electron from the Co-C sigma-bond to a pi*(corrin) orbital. This LLCT transition mixes with the pipi*(corrin) transitions. ...

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