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Photochemical and catalytic properties of dimeric species of molybdenum(V) by Laura Sofı́a Villata; Mario R. Féliz; Alberto L. Capparelli is a Chemistry article available to read on EtoBox.

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The chemistry and photochemistry of molybdenum coordination compounds in its several oxidation states is of great importance from basic as well as applied points of view. Molybdenum is a relevant element for the synthesis of many homogeneous and heterogeneous catalysts. This element is also essential in several enzymatic systems. One of the characteristics of the molybdenum chemistry is related to the easy conversion between its oxidation states and to the changes of coordination number, observed particularly between Mo III , Mo V and Mo VI . Many aspects of the chemistry of Mo V have been reviewed. However, the thermal and photochemical reactivity of its complexes was not completely well understood until few years ago. Our studies have shown that aqueous solutions of Mo 2 O 4 (H 2 O) 6 - xL x n + complexes (where L is a monodentate ligand, such as H 2 O, Cl -, NCS -, Br -or bidentate such as cysteine), present dual reactivity; ligand -metal charge transfer (LMCT) and photolabilization of the ligand. The excitation induces photolabilization resulting in the formation of a single bridged m-oxo-dimer that undergoes dissociative disproportionation into monomeric Mo IV and Mo VI specie

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Author

Laura Sofı́a Villata; Mario R. Féliz; Alberto L. Capparelli

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0010-8545)

Published

2000

Language

EN

Field

Chemistry (Physical Sciences)