Kinetics of the electron-transfer reactions of azaviolene radical ions. 2. Correlation with the Marcus theory. The question of concerted acid-base catalysis

1977 ◽  
Vol 99 (7) ◽  
pp. 2214-2221 ◽  
Author(s):  
Claude F. Bernasconi ◽  
Hsien-Chang Wang

1992 ◽  
Vol 70 (1) ◽  
pp. 39-45 ◽  
Author(s):  
Donal H. Macartney ◽  
Samuel Mak

The kinetics of the outer-sphere electron transfer reactions of tris(1,1′-dioxo-2,2′-bipyridine)cobalt(II) and (III) with a series of nickel polyaza macrocycles, FeL3n+ and OsL32+ complexes (L is 2,2′-bipyridine or 1,10-phenanthroline, and substituted derivatives), and Rh2(O2CCH3)4(CH3CN)2+ have been investigated in acetonitrile at 25.0 °C. An application of the Marcus theory relationship to the cross-reaction rate constants yielded apparent Co(bpyO2)32+/3+ self-exchange rate constants of 102 M−1 s−1 from the nickel macrocycle cross-reactions and 10−1 M−1 s−1 from the cross-reactions with the metal polypyridine complexes. The latter cross-reactions are considered to be non-adiabatic due to a mismatch in the donor/acceptor orbital symmetries. The electron exchange rate constant is compared with the exchange rate constants for other Co(II)/Co(III) complex couples and M(bpyO2)32+/3+ couples of other first-row transition metals, and discussed in terms of inner-sphere and solvent reorganization barriers. Keywords: electron transfer, Marcus theory relationship, cobalt(II)/(III) couples, 1,1′-dioxo-2,2′-bipyridine.



1974 ◽  
Vol 5 (38) ◽  
pp. no-no
Author(s):  
CLAUDE F. BERNASCONI ◽  
ROBERT G. BERGSTROM ◽  
WILLIAM J. JUN. BOYLE


1974 ◽  
Vol 96 (14) ◽  
pp. 4643-4650 ◽  
Author(s):  
Claude F. Bernasconi ◽  
Robert G. Bergstrom ◽  
William J. Boyle






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