Geometric isomers of 2, 6-dimethyl-2, 6-octadiene and ocimene were obtained from myrcene by the, hydrogenation and isomerization reaction using pentacyanocobaltate(g) as a catalyst. In the case of alloocimene, 2, 6-dimethyl-2, 4-octadiene was obtained. This octadiene was no more hydrogenated From these resglts, the reactivity of the conjugated double boad ih these reactions was discussed.
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Tanaka et al. (1974) studied this question.