THERMAL-DECOMPOSITION OF ETHYLENE-OXIDE ON PD(111) - COMPARISON OF THE PATHWAYS FOR THE SELECTIVE OXIDATION OF ETHYLENE AND OLEFIN METHATHESIS

被引：34

作者：

LAMBERT, RM

ORMEROD, RM

TYSOE, WT

机构：

[1] UNIV WISCONSIN,DEPT CHEM,MILWAUKEE,WI 53211

[2] UNIV WISCONSIN,SURFACE STUDIES LAB,MILWAUKEE,WI 53211

[3] UNIV CAMBRIDGE,DEPT CHEM,CAMBRIDGE CB2 1EW,ENGLAND

[4] UNIV KEELE,DEPT CHEM,KEELE ST5 5BG,STAFFS,ENGLAND

来源：

LANGMUIR | 1994年 / 10卷 / 03期

关键词：

D O I：

10.1021/la00015a022

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The product distribution detected in the multimass temperature-programmed desorption of a saturated overlayer of ethylene oxide adsorbed on Pd(111) at approximately 180 K indicates that it decomposes to yield ethylene and acetaldehyde. These observations are interpreted by postulating that ethylene oxide reacts to form an oxymetallocycle. This is proposed to thermally decompose in a manner analogous to carbometallocycles that form during olefin metathesis catalysis by the reaction between an alkene and a surface carbene. Thus, the metallocycle can decompose to yield ethylene and deposit adsorbed atomic oxygen or undergo a beta-hydrogen transfer to form acetaldehyde.

引用

页码：730 / 733

页数：4

共 35 条

[11] STUDIES ON THE MECHANISM OF OLEFIN METATHESIS PROMOTED BY A HETEROGENEOUS CATALYST [J].