Abstract
The electrode reaction mechanisms of quinoline and its derivatives at the dropping mercury electrode in non-aqueous solvent have been studied by Fujinaga et al. They found that, in dimethylformamide, quinoline gives two one-electron reduction waves corresponding to successive reductions of the pyridine ring, and 6-chloroquinoline gives three waves: the first two-electron reductoin wave corresponds to dechlorination reaction and the successive two one-electron waves the reductions of the pyridine ring. On the other hand, the polarographic behavior of 8-hydroxyquinoline was very intricate, as if a hydrogen bridging between the oxygen and nitrogen atoms complicates the electrode reaction by its stabilizing action on resonance. In this respect, the present paper deals with the investigation on 5-hydroxyquinoline free from such a hydrogen bridging.
