Radical anions of acyclic vicinal oligoketones: An electron spin resonance study

Article abstract of DOI:10.1016/S0040-4020(99)00159-3

Radical anions of acyclic vicinal oligoketones with up to five CO units, 1a-d(·-) and 2a-c(·-), were generated by reduction of the parent compounds with potassium in presence of kryptofix 222 and studied by ESR measurements. The inverse correlation between g-values and the amount of spin populations on the terminal substituents prove that these radical anions are extended π-systems.