REAL

Low- and high-temperature hydrogenative ring-opening of alkyl-substituted cyclopropanes and methyloxirane over Pd/SiO2 catalyst: detection of β-hydride by a chemical method

Pálinkó, István and Notheisz, Ferenc and Bartók, Mihály (1990) Low- and high-temperature hydrogenative ring-opening of alkyl-substituted cyclopropanes and methyloxirane over Pd/SiO2 catalyst: detection of β-hydride by a chemical method. Journal of Molecular Catalysis, 63 (1). pp. 43-54. ISSN 0304-5102 (print); 1873-3131 (online)

[img] PDF
105085.pdf
Restricted to Registered users only

Download (770Kb)

Abstract

The hydrogenative ring-opening of five alkyl-substituted cyclopropanes and of methyl-oxirane on Pd/SiO2 was studied at different temperatures in a closed circulation reactor. For cyclopropanes, the ring opens through simple hydrogenation, giving exclusively saturated hydrocarbons, whereas alcohols (hydrogenation), oxo compounds (isomerization) and also cracking products are produced from methyloxirane. The substituents exert significant effects on the regioselectivity of the reactions for both type of molecules. For the cyclic hydrocarbons, mechanistic pathways are discussed on the basis of the stereochemistry of the compounds and the characteristic features of the ring-opening rate vs. H2-pressure functions. Finally, a chemical method is proposed for the detection of β-hydride.

Item Type: Article
Subjects: Q Science / természettudomány > QD Chemistry / kémia
Depositing User: Erika Bilicsi
Date Deposited: 19 Sep 2012 13:25
Last Modified: 25 Sep 2012 08:05
URI: http://real.mtak.hu/id/eprint/3022

Actions (login required)

View Item View Item