Radical anions of pyridine derivatives

Kalyanaraman, V. ; Rao, C. N. R. ; George, M. V. (1971) Radical anions of pyridine derivatives Journal of the Chemical Society B: Physical Organic . pp. 2406-2409. ISSN 0045-6470

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Official URL: http://pubs.rsc.org/en/content/articlelanding/1971...

Related URL: http://dx.doi.org/10.1039/J29710002406


Pyridine radical anion, generated by alkali-metal reduction of pyridine shows an absorption maximum around 340 nm, the actual position varying with the counter-cation. The change in the spectra of the pyridine radical anion with time is due to formation of radical anions and dianions of 4,4'-, and 2,2'-bipyridyls. Alkylpyridines with substituents in the 3- or 4-position form stable radical anions which do not undergo dimerization. Electron-withdrawing groups produce a bathochromic shift of the absorption band of the pyridine radical anion.

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