Hydrogenating properties of rhenium chlorides and sulfides

1.	It was found that trivalent rhenium chloride has a high activity in the hydrogenation of the C=C bonds in cyclohexene, the pyridine ring, and thiophene at 200–270°, a hydrogen pressure of 130–140 atm, and a reaction time of 3 h.
2.	Rhenium(III) chloride has a higher activity than rhenium heptasulfide in reducing the C=C bond in cyclohexane and the pyridine ring