Katalytische Eigenschaften von Molybdän-Aluminiumoxid-Katalysatoren. II

Studies were made on the deuteration of cyclohexadiene over reduced and sulfided molybdena-alumina. The deuteration reaction goes in two steps. At first cyclohexene is formed and this is further hydrogenated to cyclohexane. The formation of cyclohexadiene-d 4 can be explained by equal exchange in the four vinyl positions of cyclohexadiene over the coordinately unsaturated sites of the molybdena. The sulfited molybdena-alumina exhibited a much lower hydrogenation rate for the cyclohexadiene