Hydrogenative ring-opening reactions of alkyl-substituted cyclopropanes over Pt/SiO2 catalyst

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Abstract

The hydrogenative ring-opening reactions of five alkyl-substituted cyclopropanes [ethyl-(ECP), cis-1,2-dimethyl- (cDMCP) and trans-1,2-dimethyl- (tDMCP), 1,1-dimethyl-(1,1DMCP) and 1,1,2,2,-tetramethyl- (TMCP) cyclopropane] over Pt/SiO2 catalyst were studied. The shapes of the curves depicting product formation rate vs. H2 pressure suggest that CC as well as CH bond rupture occurs upon adsorption. Based on stereochemical considerations and on comparisons of product formation at the maximum rates, it is proposed that cDMCP forms a flat-lying complex over the surface of the catalyst and tDMCP, 1,1DMCP and TMCP react through edge-on surface intermediates. IR measurements concerning the reaction of ECP support the proposed dissociative adsorption.

Original languageEnglish
Pages (from-to)313-319
Number of pages7
JournalJournal of molecular catalysis
Volume77
Issue number3
DOIs
Publication statusPublished - Dec 1 1992

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ASJC Scopus subject areas

  • Engineering(all)

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