The chemical reduction of some 2-monosubstituted and 2,4-disubstituted pyridinium ions has been investigated by means of e.s.r. spectroscopy and the results compared with those of an electrochemical study on the same species. By combining the electrochemical and e.s.r. data, a scale of stability has been determined for the investigated pyridinyl radicals. N-Methyl-2-cyanopyridinyl, which was found to be too unstable to be observed, eventually evolved to the 2,4-dicyano-substituted radical. E.s.r. studies have also been carried out on the structurally similar, although more persistent, N-germylpyridinyls.
An electron spin resonance and voltammetric investigation of some 2-mono- and 2,4-disubstituted pyridinyl radicals / Greci, L.; Alberti, A.; Carelli, I.; Trazza, A.; Casini, Antonio. - In: JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS II. - ISSN 0300-9580. - STAMPA. - 12:(1984), pp. 2013-2018.
An electron spin resonance and voltammetric investigation of some 2-mono- and 2,4-disubstituted pyridinyl radicals
CASINI, Antonio
1984
Abstract
The chemical reduction of some 2-monosubstituted and 2,4-disubstituted pyridinium ions has been investigated by means of e.s.r. spectroscopy and the results compared with those of an electrochemical study on the same species. By combining the electrochemical and e.s.r. data, a scale of stability has been determined for the investigated pyridinyl radicals. N-Methyl-2-cyanopyridinyl, which was found to be too unstable to be observed, eventually evolved to the 2,4-dicyano-substituted radical. E.s.r. studies have also been carried out on the structurally similar, although more persistent, N-germylpyridinyls.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
