One-electron reduction of quinoxaline derivatives and EPR spectra of their anion radicals

1972 ◽  
Vol 5 (6) ◽  
pp. 612-615
Author(s):  
L. L. Gordienko ◽  
Yu. S. Rozum ◽  
A. G. Chukhlantseva ◽  
V. N. Rudenko
Keyword(s):  
Epr Spectra ◽  
Quinoxaline Derivatives ◽  
Electron Reduction ◽  
Anion Radicals

One-Electron Reduction of Kinetically Stabilized Dipnictenes:  Synthesis of Dipnictene Anion Radicals

2006 ◽  
Vol 128 (38) ◽  
pp. 12582-12588 ◽  
Author(s):  
Takahiro Sasamori ◽  
Eiko Mieda ◽  
Noriyoshi Nagahora ◽  
Kazunobu Sato ◽  
Daisuke Shiomi ◽  
...  
Keyword(s):  
Electron Reduction ◽  
Anion Radicals

EPR spectra of anion radicals of certain alkyl-substituted polysilanes

1968 ◽  
Vol 17 (5) ◽  
pp. 967-969 ◽  
Author(s):  
V. V. Bukhtiyarov ◽  
S. P. Solodovnikov ◽  
O. M. Nefedov ◽  
V. I. Shiryaev
Keyword(s):  
Epr Spectra ◽  
Anion Radicals

Electrochemical and spectroelectrochemical characterization of Cu(II) and Mn(III) tetrabutano- and tetrabenzoporphyrins containing sterically hindered meso -(2,6-difluorophenyl) substituents in nonaqueous media

2019 ◽  
Vol 23 (09) ◽  
pp. 1057-1071 ◽  
Author(s):  
Liping Wang ◽  
Yuanyuan Fang ◽  
Weijie Xu ◽  
Zhongping Ou ◽  
Karl M. Kadish
Keyword(s):  
Central Metal ◽  
Redox Potentials ◽  
Nonaqueous Media ◽  
The Third ◽  
Sterically Hindered ◽  
Electron Reduction ◽  
The Given ◽  
Spectroelectrochemical Properties ◽  
Anion Radicals

Four tetrabutano and tetrabenzoporphyrins containing sterically hindered meso-(2,6-difluorophenyl) substituents and copper(II) or manganese(III) central metal ions were synthesized and characterized as to their electrochemical and spectroelectrochemical properties in nonaqueous media. The copper(II) derivatives exhibit the expected two one-electron reductions to give [Formula: see text]-anion radicals and dianions in CH2Cl2. Electrochemical and spectroelectrochemical data suggest that a Cu(II) phlorin anion is generated from the doubly reduced Cu(II) butanoporphyrin and it is this species which undergoes the third reduction in pyridine. The first one-electron reduction of the Mn(III) porphyrins is metal-centered to give a Mn(II) compound, while the second and third reductions are macrocycle-centered to give Mn(II) porphyrin [Formula: see text]-anion radicals and dianions in both CH2Cl2 and pyridine. A Mn(II) phlorin anion is also generated from the Mn(II) dianion on the spectroelectrochemical timescale under the given solution conditions. The [Formula: see text],[Formula: see text]-butano and benzo groups have a significant effect on the measured redox potentials. Steric hindrance of the meso-(2,6-difluorophenyl) substituents also has an effect on the potential separation between the first two oxidations of the benzoporphyrins.

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