Repository of the Academy's Library

Activity, selectivity, and stereochemical features in the copper-catalyzed hydrogenative ring-opening of alkyl-substituted cyclopropanes-nature of active sites

Pálinkó, István and Molnár, Árpád and Kiss T., János and Bartók, Mihály (1990) Activity, selectivity, and stereochemical features in the copper-catalyzed hydrogenative ring-opening of alkyl-substituted cyclopropanes-nature of active sites. Journal of Catalysis, 121 (2). pp. 396-407. ISSN 0021-9517

[img] PDF
105096.pdf
Restricted to Registered users only

Download (735Kb)

Abstract

The reactions of four alkyl-substituted cyclopropanes in a hydrogen atmosphere in a closed circulation system have been studied over silica-supported and support-free copper catalysts made by different methods. Both isomerization and direct hydrogen addition occur. The ring opens in both the sterically more hindered and less hindered directions. On the basis of the kinetic data, mechanistic considerations are discussed. The catalysts were studied by N20 titration and TPR (temperature-programmed reduction). The properties of the reactions and the TPR data indicate that the active centers are atomic clusters for the direct hydrogenation and Cu(I) ions for the ring-opening from the sterically hindered direction through the formation of olefinic compounds.

Item Type: Article
Subjects: Q Science / természettudomány > QD Chemistry / kémia
Depositing User: Erika Bilicsi
Date Deposited: 20 Sep 2012 06:14
Last Modified: 25 Sep 2012 08:08
URI: http://real.mtak.hu/id/eprint/3024

Actions (login required)

View Item View Item