Abstract
1. The liquid phase hydrogenation of methylcyclopentene was studied in the presence of metals of group VIII. The activity of the indicated metals decreased in the series: Pt > Rh > Pd > Ir ≫Os, Ru, Co. 2. The stereochemistry of the hydrogenation of dialkylcyclopentenes was studied in the presence of platinum, palladium, rhodium, and iridium deposited on activated charcoal. The mixture of stereoisomeric 1,2-dialkylcyclopentanes formed was enriched with the trans-form in the presence of the first two catalysts and with the cis-form in the presence of rhodium and especially iridium. 3. New concepts of the mechanism of the hydrogenation of substituted cycloolefins on both groups of catalysts, considering the stereospecificity of the process, were discussed.
Published Version
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