A Plausible Mechanism for the Mutagenic Activity (Salmonella typhimuriumTA100) of MX Compounds: A Formation of CG-CG+-CG Radical Cation by One-electron Reduction

2,2′-Bipyridyl dimethiodide in aqueous solution in the pH range 5.0-8.9 gives a symmetrical one-electron reduction wave independent of pH and concentration at a potential of —0.96 V against a standard calomel electrode due to the formation of the corresponding radical cation. At a much lower potential it also shows a second reduction wave which is pH dependent.

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PHOTOINDUCED TWO-ELECTRON REDUCTION OF METHYL VIOLOGEN DIMER BY 2-PROPANOL THROUGH INTRAMOLECULAR PROCESS AND FORMATION OF VIOLOGEN RADICAL CATION DIMER

Chemistry Letters ◽

10.1246/cl.1980.821 ◽

1980 ◽

Vol 9 (7) ◽

pp. 821-824 ◽

Cited By ~ 27

Author(s):

Masaoki Furue ◽

Shun-ichi Nozakura

Keyword(s):

Radical Cation ◽

Methyl Viologen ◽

Electron Reduction ◽

Intramolecular Process

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Interfacial interactions and the heterogeneous one-electron reduction of methyl viologen

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19871097 ◽

1987 ◽

Vol 52 (5) ◽

pp. 1097-1114 ◽

Cited By ~ 14

Author(s):

Michael Heyrovský ◽

Ladislav Novotný

Keyword(s):

Electron Transfer ◽

Radical Cation ◽

Electrode Surface ◽

Methyl Viologen ◽

Potential Range ◽

Standard Redox Potential ◽

Mercury Electrodes ◽

Electron Reduction ◽

The One ◽

Surface Redox

The one-electron reversible electroreduction of methyl viologen to its radical cation in aqueous solutions on mercury electrodes proceeds, according to potential, concentration and time of electrolysis, in various ways. Methyl viologen is adsorbed in flat orientation at the electrode surface; it undergoes a surface redox process in π-interaction with the metal in a potential range positive by about 0.2 V of the beginning of the electroreduction. The actual reduction starts by electron transfer followed by adsorption of the radical cation and, at higher concentrations and in a narrow potential range, by crystallization at the electrode surface of a salt of the radical cation. In solution near the electrode the radical cation dimerizes and the dimer also adsorbs at the electrode. In the region of the standard redox potential and more negative the reduction proceeds by electron transfer from the electrode covered by a layer of the radical cation or of its dimer.

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An efficient synthetic route to stable bis(carbene)borylenes [(L1)(L2)BH]

Chemical Communications ◽

10.1039/c4cc03497j ◽

2014 ◽

Vol 50 (58) ◽

pp. 7837-7839 ◽

Cited By ~ 106

Author(s):

David A. Ruiz ◽

Mohand Melaimi ◽

Guy Bertrand

Keyword(s):

Radical Cation ◽

Synthetic Route ◽

Electron Reduction

Two unsymmetrically substituted bis(carbene)borylene adducts [(L1)(L2)BH] and a radical cation [(L1)(L2)BH˙+, X−] are prepared by two- and one-electron reduction, respectively.

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