Current Search: Department of Chemistry and Biochemistry (x) » CHARNEY, LYNN MARLENE. (x)
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Title
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ELECTROCHEMISTRY OF MONOMERIC MOLYBDENUM (VI)-, (V)-, (IV)- AND (III)- CATECHOL COMPLEXES IN AQUEOUS MEDIA.
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Creator
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CHARNEY, LYNN MARLENE., Florida Atlantic University, Schultz, Franklin A., Charles E. Schmidt College of Science, Department of Chemistry and Biochemistry
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Abstract/Description
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The electrochemical reduction of the cis-dioxo Mo(VI)-catechol complex, MoO2(cat2^2-, is investigated at a mercury electrode in pH 3.5-10 aqueous buffers utilizing the techniques of cyclic voltammetry and controlled potential coulometry. The reduction of MoO2(cat2^2- proceeds by successive two-proton, one-electron and two- proton, two-electron transfer steps which produce monomeric Mo(V) and Mo(III) species. At pH 3.5-7 the Mo(V) monomer is unstable and undergoes dimerization. The mechanism...
Show moreThe electrochemical reduction of the cis-dioxo Mo(VI)-catechol complex, MoO2(cat2^2-, is investigated at a mercury electrode in pH 3.5-10 aqueous buffers utilizing the techniques of cyclic voltammetry and controlled potential coulometry. The reduction of MoO2(cat2^2- proceeds by successive two-proton, one-electron and two- proton, two-electron transfer steps which produce monomeric Mo(V) and Mo(III) species. At pH 3.5-7 the Mo(V) monomer is unstable and undergoes dimerization. The mechanism of the dimerization reaction and the structure of the Mo(V) dimer produced are determined. At pH 7-10 the monomeric Mo (V) and 2- Mo(III) complexes produced by reduction of MoO2(cat2^2- are stable. A stable Mo(IV) species is obtained upon reoxidation of the Mo( III ) monomer. The epr spectrum of the monomeric Mo(V) complex and visible spectra of all oxidation states in alkaline solution arc reported.
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Date Issued
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1979
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PURL
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http://purl.flvc.org/fcla/dt/13979
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Subject Headings
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Electrochemistry
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Format
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Document (PDF)
