Titanium(III) chemistry: electron-transfer reactions with ground-state poly(pyridine)osmium(III) complexes, quenching reactions with excited-state poly(pyridine)ruthenium(II) complexes, and formal reduction potentials

1979 ◽  
Vol 18 (7) ◽  
pp. 1731-1736 ◽  
Author(s):  
Bruce S. Brunschwig ◽  
Norman Sutin
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Ground State ◽  
Transfer Reactions ◽  
Electron Transfer Reactions ◽  
Reduction Potentials

Electron transfer reactions. Reaction of nitrones with potassium

1987 ◽  
Vol 65 (9) ◽  
pp. 2039-2049 ◽  
Author(s):  
Konda Ashok ◽  
Pallikkaparambil M. Scaria ◽  
Prashant V. Kamat ◽  
Manapurathu V. George
Keyword(s):  
Electron Transfer ◽  
Transfer Reactions ◽  
Radical Anions ◽  
Cyclic Voltammetric ◽  
Electron Transfer Reactions ◽  
Reduction Potentials ◽  
Dimeric Product ◽  
Voltammetric Studies ◽  
Electron Transfer Processes ◽  
Cyclic Voltammetric Studies

Treatment of nitrones (1a–d, 26a,b, 34, 49) with potassium in tetrahydrofuran (THF) gives rise to radical anion (2a–d, 27a,b, 35, 50) and dianion intermediates (3a–d, 28a,b, 36) through electron transfer reactions. These intermediates undergo further transformations to give a variety of products. Thus, the aldehydonitrones (1a–d) give the corresponding aldehydes (10a–c), carboxylic acids (25a–c), and azobenzenes (19a,d), whereas the ketonitrones (26a,b) give deoxygenation products (31a,b). The nitrone 34 gave a mixture of products consisting of benzoic acid (25a), dibenzyl (48), the dimeric product 38, and tetraphenylpyrazine (46), whereas 49 did not give any isolable product. Cyclic voltammetric studies have been employed to measure the reduction potentials for both one-electron and two-electron transfer processes, leading to the radical anions and dianions respectively. These intermediates have been characterized through their electronic spectra and they were quenched by oxygen. Pulse radiolysis of the nitrones 1a–d, 26a,b, 34, and 49 also gave the corresponding radical anions 2a–d, 27a,b, 35, and 50, characterized by their spectra.

Competition and Interplay of Various Intermolecular Interactions in Ultrafast Excited-State Proton and Electron Transfer Reactions

2014 ◽  
Vol 119 (6) ◽  
pp. 2444-2453 ◽  
Author(s):  
Michael G. Kuzmin ◽  
Irina V. Soboleva ◽  
Vladimir L. Ivanov ◽  
Elizabeth-Ann Gould ◽  
Dan Huppert ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Intermolecular Interactions ◽  
Transfer Reactions ◽  
Electron Transfer Reactions
Sign in / Sign up

Export Citation Format

Share Document