HYDROGENATIVE RING-OPENING REACTIONS OF ALKYL-SUBSTITUTED CYCLOPROPANES OVER PT/SIO2 CATALYST

被引：16

作者：

PALINKO, I ^{[1
]}

NOTHEISZ, F ^{[1
]}

KISS, JT ^{[1
]}

BARTOK, M ^{[1
]}

机构：

[1] ATTILA JOZSEF UNIV,DEPT ORGAN CHEM,DOM TER 8,H-6720 SZEGED,HUNGARY

来源：

JOURNAL OF MOLECULAR CATALYSIS | 1992年 / 77卷 / 03期

关键词：

D O I：

10.1016/0304-5102(92)80210-8

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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. H-2 pressure suggest that C-C as well as C-H 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.

引用

页码：313 / 319

页数：7

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