Abstract
Polarographic and spectrophotometric examinations on reduction-products obtained by electrolyses at controlled potentials led to the following interpretations in electrode-reductions of vitamin A and its related compounds in acetonitrile benzene mixture. Each of vitamin Aalcohol and palmitate is reduced to a structure of conjugated four doublebond system at the first step, and then, at the second step to a conjugated three doublebond system. The first reduction-products of β-carotene are not uniform and their structures cannot be clarified, but the second reduction-products show absorption spectra of conjugated three double-bond system, consequently, products by the third reduction-step would have a structure of conju-gated two double-bond.
