Carbon-13 NMR investigation of the electron exchange reaction between tris(ethylenediamine)ruthenium(II) and tris(ethylenediamine)ruthenium(III) ions
Journal Article
·
· J. Phys. Chem.; (United States)
The rate of electron exchange between Ru(en)/sub 3//sup 3 +/ and Ru(en)/sub 3//sup 2 +/ has been measured by NMR line-broadening techniques observing the /sup 13/C spectrum of the diamagnetic Ru(II) complex. At 298 K in a solution of 0.25 M (Ru(en)/sub 3/)(CF/sub 3/SO/sub 3/)/sub 2/, giving an ionic strength of 0.75 M, the rate constant is 3.1 x 10/sup 4/ M/sup -1/s/sup -1/, with ..delta..H/sup */ = 6.0 kcal mol/sup -1/ and ..delta..S/sup */ = -17 cal deg/sup -1/ mol/sup -1/. At half this concentration of Ru(II) the rate constant is 1.7 x 10/sup 4/ M/sup -1/s/sup -1/. These rates are more rapid than the corresponding Ru(NH/sub 3/)/sub 6//sup 3+/2+/ electron exchange rate, as is predicted by the Marcus theory of electron transfer.
- Research Organization:
- Univ. of Sydney, Australia
- OSTI ID:
- 5331878
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 90:16; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Journal Article
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Sat Oct 01 00:00:00 EDT 1977
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·
OSTI ID:6296138
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· J. Phys. Chem.; (United States)
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
AMINES
CARBON 13
CARBON ISOTOPES
CHEMICAL REACTION KINETICS
COMPLEXES
DATA
ELECTRON TRANSFER
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
INFORMATION
ISOTOPES
KINETICS
LIGHT NUCLEI
LINE BROADENING
LINE WIDTHS
MAGNETIC RESONANCE
MEDIUM TEMPERATURE
NMR SPECTRA
NUCLEAR MAGNETIC RESONANCE
NUCLEI
NUMERICAL DATA
ORGANIC COMPOUNDS
REACTION KINETICS
RESONANCE
RUTHENIUM COMPLEXES
SPECTRA
STABLE ISOTOPES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPLEXES
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
AMINES
CARBON 13
CARBON ISOTOPES
CHEMICAL REACTION KINETICS
COMPLEXES
DATA
ELECTRON TRANSFER
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
INFORMATION
ISOTOPES
KINETICS
LIGHT NUCLEI
LINE BROADENING
LINE WIDTHS
MAGNETIC RESONANCE
MEDIUM TEMPERATURE
NMR SPECTRA
NUCLEAR MAGNETIC RESONANCE
NUCLEI
NUMERICAL DATA
ORGANIC COMPOUNDS
REACTION KINETICS
RESONANCE
RUTHENIUM COMPLEXES
SPECTRA
STABLE ISOTOPES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPLEXES