VOLTAMMETRIC BEHAVIOR OF MONOMERIC FAC-TRIOXOMOLYBDENUM(VI) COMPLEXES WITH AMINOCARBOXYLIC LIGANDS IN AQUEOUS-MEDIA

被引：8

作者：

DOMENECH, A

LLOPIS, E

CERVILLA, A

VICENTE, F

机构：

[1] Dep. de Química Inorgànica, Facultat de Química, Universitat de València, 46100 Burjassot, València

来源：

POLYHEDRON | 1992年 / 11卷 / 12期

关键词：

D O I：

10.1016/S0277-5387(00)83146-0

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Cyclic voltammetry, polarography and controlled-potential coulometry experiments have been used to characterize the electrochemical reduction of fac-MoO3L2- complexes (L = aspartic acid or iminodiacetic acid) in aqueous media. These complexes are reduced in two irreversible proton-assisted steps to give an oxo-bridged molybdenum(V) species and then to a molybdenum(III) dimer species. At pH 4.5, the former reduction step for the iminodiacetic acid ligand occurs at E(p) = -0.75 V, while the second one appears at -1.12 V vs SCE. The overall electrochemical process can be described in terms of a homogeneous chemical reaction, coupled between two electron transfers (ECE mechanism), that involves an Mo(IV) intermediate species.

引用

页码：1517 / 1522

页数：6

共 20 条

[1]

Bard A., 1980, ELECTROCHEMICAL METH

[2]

BRAY RC, 1980, MOLYBDENUM CHEM BIOL, P117

[3] ELECTRONIC STATES OF DIOXO-DI-MU-OXO-DIMOLYBDATE (V) GROUP [J].