Note
Thesis (M.S.)--Florida Atlantic University, 1975.
Member of
Contributors
Publisher
Florida Atlantic University
Date Issued
1975
Description
The binuclear , di-mju-oxo-bridged molybdenum(V)-cysteine complex,
Na2Mo2O4(cys)2, is frequently cited as a chemical model for nitrogenase
enzyme. Coulometric reduction of Na2Mo2O4(cys)2 at the potential of
Mo(V)--> Mo(III) reduction (-1. 35 to -1.50 V vs. SCE) in the presence o£
the nitrogenase substrate, acetylene, produces ethylene and ethane. Reduction of C2H2 does not occur in the absence of the molybdenumcysteine
complex. The quantities of C2H4 and C2H6 produced are greater
than the stoichiometric molybdenum content, hence the reduction is
catalytic. Acetylene reduction is accompanied by catalytic hydrogen
evolution at the surface of the mercury electrode. The rate of acetylene
reduction and product yields vary with pH, applied electrode potential,
concentration of Na2Mo2O4(cys)2, and the buffer salt. A mechanism for
the catalytic process is proposed, and its relationship to chemical
models for nitrogenase enzyme is discussed.
Na2Mo2O4(cys)2, is frequently cited as a chemical model for nitrogenase
enzyme. Coulometric reduction of Na2Mo2O4(cys)2 at the potential of
Mo(V)--> Mo(III) reduction (-1. 35 to -1.50 V vs. SCE) in the presence o£
the nitrogenase substrate, acetylene, produces ethylene and ethane. Reduction of C2H2 does not occur in the absence of the molybdenumcysteine
complex. The quantities of C2H4 and C2H6 produced are greater
than the stoichiometric molybdenum content, hence the reduction is
catalytic. Acetylene reduction is accompanied by catalytic hydrogen
evolution at the surface of the mercury electrode. The rate of acetylene
reduction and product yields vary with pH, applied electrode potential,
concentration of Na2Mo2O4(cys)2, and the buffer salt. A mechanism for
the catalytic process is proposed, and its relationship to chemical
models for nitrogenase enzyme is discussed.
Language
Type
Form
Extent
88 p.
Subject (Topical)
Identifier
13732
Additional Information
Thesis (M.S.)--Florida Atlantic University, 1975.
Charles E. Schmidt College of Science
FAU Electronic Theses and Dissertations Collection
Date Backup
1975
Date Text
1975
Date Issued (EDTF)
1975
Extension
FAU
FAU
admin_unit="FAU01", ingest_id="ing1508", creator="staff:fcllz", creation_date="2007-07-19 01:32:22", modified_by="staff:fcllz", modification_date="2011-01-06 13:09:02"
IID
FADT13732
Issuance
monographic
Organizations
Attributed name: Florida Atlantic University
Attributed name: Charles E. Schmidt College of Science
Attributed name: Department of Chemistry and Biochemistry
Person Preferred Name
LEDWITH, DEBRA ANN
Graduate College
Physical Description
88 p.
application/pdf
Title Plain
ELECTROCHEMICALLY CATALYZED REDUCTION OF ACETYLENE BY A MOLYBDENUM - CYSTEINE COMPLEX
Use and Reproduction
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Origin Information
1975
monographic
Boca Raton, FL
Florida Atlantic University
Physical Location
Florida Atlantic University Libraries
Place
Boca Raton, FL
Sub Location
Digital Library
Title
ELECTROCHEMICALLY CATALYZED REDUCTION OF ACETYLENE BY A MOLYBDENUM - CYSTEINE COMPLEX
Other Title Info
ELECTROCHEMICALLY CATALYZED REDUCTION OF ACETYLENE BY A MOLYBDENUM - CYSTEINE COMPLEX