6533b828fe1ef96bd12877a2

RESEARCH PRODUCT

Voltammetric behaviour of monomeric fac-trioxomolybdenum(VI) complexes with aminocarboxylic ligands in aqueous media

Antonio CervillaAntonio DoménechElisa LlopisFrancisco Vicente

subject

chemistry.chemical_classificationPolarographyReaction mechanismAqueous solutionChemistryIminodiacetic acidLigandCarboxylic acidInorganic chemistryInorganic ChemistryCoulometrychemistry.chemical_compoundMaterials ChemistryPhysical and Theoretical ChemistryCyclic voltammetry

description

Abstract 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 Ep = −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 MoIV intermediate species.

yearjournalcountryeditionlanguage
1992-01-01Polyhedron
https://doi.org/10.1016/s0277-5387(00)83146-0