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Hydrogen pressure dependence in the ring opening of methyloxirane over silica-supported Pd and Rh catalysts: Effect of high temperature on ring-opening routes

Pálinkó, István and Ocsko, J. (1996) Hydrogen pressure dependence in the ring opening of methyloxirane over silica-supported Pd and Rh catalysts: Effect of high temperature on ring-opening routes. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 104 (3). pp. 261-265. ISSN 1381-1169

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Abstract

The high-temperature ring-opening reactions of methyloxirane were investigated with or without added hydrogen over silica-supported Pd and Rh catalysts. Without added hydrogen, mainly isomerization occurred, giving acetone through the rupture of the sterically less hindered C-O bond (route b). With added hydrogen, hydrogenative ring opening also took place and the sterically more hindered C-O bond was broken as well (route a). At 473 K allyl alcohol was formed too: a product not found at lower temperatures. Since route a was predominant over both catalysts, a bifunctional mechanism had to be considered. It is known that methyloxirane adsorbs irreversibly, therefore the shape of product formation rate vs. hydrogen pressure curves could be used for mechanistic considerations.

Item Type: Article
Subjects: Q Science / természettudomány > QD Chemistry / kémia
Q Science / természettudomány > QD Chemistry / kémia > QD02 Physical chemistry / fizikai kémia
SWORD Depositor: MTMT SWORD
Depositing User: MTMT SWORD
Date Deposited: 28 May 2013 11:10
Last Modified: 28 May 2013 11:10
URI: http://real.mtak.hu/id/eprint/5314

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