Ring-expansion of methylcyclopentane to cyclohexane and ring-contraction of cyclohexane to methylcyclopentane on silica-supported 12-tungstophosphoric acid and stoichiometric and nonstoichiometric microporous silver 12-tungstophosphate

被引：15

作者：

Gao, SQ

Rhodes, C

Moffat, JB ^{[1
]}

机构：

[1] Univ Waterloo, Dept Chem, Waterloo, ON N2L 3G1, Canada

[2] Univ Waterloo, Guelph Waterloo Ctr Grad Work Chem, Waterloo, ON N2L 3G1, Canada

来源：

CATALYSIS LETTERS | 1998年 / 55卷 / 3-4期

关键词：

heteropoly; 12-tungstophosphoric acid; silver; 12-tungstophosphate; cyclohexane; methylcyclopentane; ring-expansion; ring-contraction;

D O I：

10.1023/A:1019091130576

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：

Methylcyclopentane is ring-expanded to cyclohexane and cyclohexane is ring-contracted to methylcyclopentane on 12-tungstophosphoric acid (HPW) supported on silica and on stoichiometric microporous silver 12-tungstophosphate. The conversions of the two reactants increase with the loading of HPW on SiO(2) while achieving significantly higher values on silver 12-tungstophosphate which pass through a maximum as the Ag/H(+) preparative ratio increases. The ring-expansion and ring-contraction processes on the supported HPW and the microporous AgPW are catalyzed by the acidic protons in the solid acid and the residual protons in the silver salt.

引用

页码：183 / 188

页数：6

共 23 条

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