ELECTROCHEMICAL-BEHAVIOR OF COSTA-TYPE ORGANOCOBALT COENZYME-B12 MODELS

被引：11

作者：

SEEBER, R

MARASSI, R

PARKER, WO

KELLY, G

机构：

[1] UNIV CAMERINO,DIPARTIMENTO SCI CHIM,I-62032 CAMERINO,ITALY

[2] EMORY UNIV,DEPT CHEM,ATLANTA,GA 30322

来源：

INORGANICA CHIMICA ACTA | 1990年 / 168卷 / 01期

基金：

美国国家卫生研究院;

关键词：

D O I：

10.1016/S0020-1693(00)88027-5

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The cathodic reduction of nine 'Costa-type' organocobalt B12 model compounds, [RCo(III)L]C1O4 (where R = alkyl ligand; L = N2,N2′-propanediylbis- (2,3-butanedione 2-imine 3-oxime) and a neutral base), was studied in acetonitrile solvent, using cyclic voltammetry, controlled potential coulometry, and spectroelectrochemical techniques. The effect of the alkyl substituents, namely i-C3H7, neo-C5H11, i-C4H9, CH3CH2, C6H5CH2, CH3, HO(CH2)2, CH3- COOCH2 and CF3CH2, on the relevant cobalt reduction mechanisms and potentials was investigated. A marked infiuence of axial group bulk on the reactivity of the low oxidation state cobalt derivatives formed in the reduction process has been evidentiated. The reactivity of these electrogenerated compounds is conditioned for the most part by their ability to form stable bisalkyl complexes. © 1900.

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页码：127 / 138

页数：12

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