CATALYTIC-HYDROGENATION OF CYCLOALKANONES ON PT-SIO2 AND RU-SIO2 - EFFECTS OF RING SIZE

被引：17

作者：

GENESTE, P

BONNET, M

RODRIGUEZ, M

机构：

[1] Laboratoire de Chimie Organique Physique Appliquée, Ecole Nationale Supérieure de Chimie de Montpellier, 34075 Montpellier Cédex

来源：

JOURNAL OF CATALYSIS | 1979年 / 57卷 / 01期

关键词：

D O I：

10.1016/0021-9517(79)90052-6

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 hydrogenations of cycloalkanones (C4C9) in the liquid phase on Pt SiO2 and Ru SiO2 have been studied from 0.1 to 150 bar in cyclohexane as solvent. Using competitive kinetic methods through the RAB parameter, a scale of reactivity is proposed. Adopting the value of 1 for cyclohexanone, we found 7.1 for cyclobutanone, 6.9 for cyclopentanone, 13.8 for cycloheptanone, 19.2 for cyclooctanone, and 17.9 for cyclononanone on Pt SiO2. These results when compared with the relative rates for BH4 nucleophilic addition reactions on carbonyl compounds and with the corresponding rates for chromic acid oxidation of cycloalkanols give a good indication for a slow step in the catalytic hydrogenation in liquid phase corresponding to the fixation of the first hydrogen atom to a Π-adsorbed species, the hybridization of the C atom passing from sp2to sp3. © 1979.

引用

页码：147 / 152

页数：6

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