Kinetics, stereochemistry, and mechanism of hydrogenation of some tert. -butylbenzenes on a rhodium catalyst

Journal Article · Sun Jul 01 04:00:00 EDT 1979 · J. Catal.; (United States)

OSTI ID:6902411

Siegel, S; Outlaw, J; Garti, N

An experimental study showed that the hydrogenation of the benzene ring of 1,3-di-tert.-butylbenzene and 1,4-di-tert.-butylbenzene on rhodium proceeds by a multistep process involving di-tert.-butylcyclohexene intermediates in which the intermediate steps are reversible and which can be described by Langmuir-Hinshelwood kinetics. Dissociative adsorption was apparently not involved in the reaction scheme. The hydrogenation of both compounds showed a first-order dependence on hydrogen. A reaction sequence was developed in which the addition of the second hydrogen, which leads to an adsorbed diene, was the rate-controlling step. Steric influences on the reaction rate were determined by competitive adsorption and reaction of tert.-butylbenzene and 1-methyl-4-tert.-butylbenzene.

• Research Organization: Univ. of Arkansas
• OSTI ID: 6902411
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 58:3; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
AROMATICS
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
ELEMENTS
EQUATIONS
HYDROGENATION
KINETIC EQUATIONS
KINETICS
METALS
ORGANIC COMPOUNDS
PLATINUM METALS
REACTION INTERMEDIATES
REACTION KINETICS
RHODIUM
STEREOCHEMISTRY
TRANSITION ELEMENTS