Studies on the Radicals Formed in Alkali Metal-reduction of Pyridinium Bis (alkoxycarbonyl) methylides by ESR Spectroscopy

Abstract

Reduction of the ylides [1], [2] has been investigated by means of ESR and UV spectroscopies. Afterdis appearance of their short-lived anion radicals, trianion radicals ([4], [6]; Fig. 2c) produced by the reduction with alkali metal in THF were ob served. ESR data (g=2.0030) have shown and that the para position of the pyridine ring was reduced complet ely (see, Fig.1).