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ELECTROCATALYTIC REDUCTION OF ACETYLENE BY MOLYBDENUM-CYSTEINE AND MOLYBDENUM-EDTA COMPLEXES
- Date Issued:
- 1977
- Summary:
- Binuclear oxo- and sulfide-bridged Mo(V)-cysteine and Mo(V)-EDTA complexes are chosen as model compounds for nitrogenase enzyme. Both groups of complexes undergo electrochemical reduction in a single four- electron step to Mo(III) dimers. The reduced binuclear Mo (III) units dissociate into catalytically active species capable of reducing the nitrogenase substrate, acetylene. Ease of dissociation increases as oxygen is replaced by sulfur in the bridging unit. Electrocatalytic reduction products of acetylene consist primarily of C2H4 and C2H6 at low partial pressures, but C4H6, C4H8, and higher hydrocarbons predominate at higher pressures. The reduction of substrate is believed to occur by a Mo(III) catalyst adsorbed on the electrode surface. A mechanism is proposed for the e lectrocatalysis, and its relationship to the enzymic catalysis is discussed.
Title: | ELECTROCATALYTIC REDUCTION OF ACETYLENE BY MOLYBDENUM-CYSTEINE AND MOLYBDENUM-EDTA COMPLEXES. |
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Name(s): |
LEAZENBEE, LOUIS O. Florida Atlantic University, Degree grantor Schultz, Franklin A., Thesis advisor Charles E. Schmidt College of Science Department of Chemistry and Biochemistry |
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Type of Resource: | text | |
Genre: | Electronic Thesis Or Dissertation | |
Issuance: | monographic | |
Date Issued: | 1977 | |
Publisher: | Florida Atlantic University | |
Place of Publication: | Boca Raton, FL | |
Physical Form: | application/pdf | |
Extent: | 87 p. | |
Language(s): | English | |
Summary: | Binuclear oxo- and sulfide-bridged Mo(V)-cysteine and Mo(V)-EDTA complexes are chosen as model compounds for nitrogenase enzyme. Both groups of complexes undergo electrochemical reduction in a single four- electron step to Mo(III) dimers. The reduced binuclear Mo (III) units dissociate into catalytically active species capable of reducing the nitrogenase substrate, acetylene. Ease of dissociation increases as oxygen is replaced by sulfur in the bridging unit. Electrocatalytic reduction products of acetylene consist primarily of C2H4 and C2H6 at low partial pressures, but C4H6, C4H8, and higher hydrocarbons predominate at higher pressures. The reduction of substrate is believed to occur by a Mo(III) catalyst adsorbed on the electrode surface. A mechanism is proposed for the e lectrocatalysis, and its relationship to the enzymic catalysis is discussed. | |
Identifier: | 13880 (digitool), FADT13880 (IID), fau:10708 (fedora) | |
Degree granted: | Thesis (M.S.)--Florida Atlantic University, 1977. | |
Collection: | FAU Electronic Theses and Dissertations Collection | |
Note(s): | Charles E. Schmidt College of Science | |
Subject(s): |
Electrochemical analysis Enzymatic analysis |
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Held by: | Florida Atlantic University Libraries | |
Persistent Link to This Record: | http://purl.flvc.org/fcla/dt/13880 | |
Sublocation: | Digital Library | |
Use and Reproduction: | Copyright © is held by the author with permission granted to Florida Atlantic University to digitize, archive and distribute this item for non-profit research and educational purposes. Any reuse of this item in excess of fair use or other copyright exemptions requires permission of the copyright holder. | |
Use and Reproduction: | http://rightsstatements.org/vocab/InC/1.0/ | |
Host Institution: | FAU | |
Is Part of Series: | Florida Atlantic University Digital Library Collections. |