Electrochimie de composés organométalliques. II. Nouvelle voie d'accès aux sels de cobalticinium substitués

Abstract

The oxidation of several substituted cyclopentadiene cobalt cyclopentadienyls electrochemically, by air, by hydrogen ions, and by triphenylmethyl tetrafluoroborate has been studied. The derivatives with an exo hydrogen yield the corresponding cobalticinium salts. When the exo substituent is CH3 or C6H5, a degradation occurs. If the exo substituent is CO2CH3, oxidation by triphenylmethyl tetrafluoroborate takes place with endo hydrogen elimination, leading to the substituted cobalticinium salt in quantitative yield.