Reference

Electrochemical formation and cleavage of bis-imidazolyls

Electrochemical formation and cleavage of bis-imidazolyls. Lang, Ulrike; Baumgaertel, Helmut (Inst. Phys. Chem., Univ. Freiburg, Freiburg/Br., Ger.). J. Electroanal. Chem. Interfacial Electrochem. 38696-53-6 is the cas registry number. This chemical is also mentioned in this article., 78(1), 133-43 (English) 1977. CODEN: JEIEBC. DOCUMENT TYPE: Journal CA Section: 72 (Electrochemistry) Section cross-reference(s): 22, 28 Bis(2,4,5-triphenylimidazolyls) result from the dimerization of 2,4,5-triphenylimidazolyls and from the nucleophilic attack of 2,4,5-triphenylimidazole anions upon 2,4,5-triphenylimidazolylium cations. The isomeric bis(imidazolyls) consist of imidazole and iso-imidazole systems. Imidazoles undergo only anodic oxidn., isoimidazoles only cathodic redn. Therefore the bis(imidazolyls) may be analyzed from their electrochem. behavior. 2,2',4,4'5,5'-Hexaphenyl-1,2'-diimidazole [7189-41-5] and 2,2',4,4',5,5'-hexaphenyl-1,4-diimidazole [63245-02-3] undergo reductive bond cleavage in an ece (chem. reaction between 2 charge transfer reactions) mechanism from which 2,4,5-triphenylimidazole anions result. The electrochem. properties of one of the bis(imidazolyls) agree with that of 1,4,5-triphenyl-2-(2,4,5-triphenylisoimidazol-4-yl)imidazole [63245-03-4] and not with that of bis(2,4,5-triphenylimidazolyl)-2,4' as reported in literature. .