C-H VIBRATIONAL MODE-SOFTENING IN ALKYL-GROUPS BOUND TO CU(111)

被引：61

作者：

LIN, JL ^{[1
]}

BENT, BE ^{[1
]}

机构：

[1] COLUMBIA UNIV, DEPT CHEM, NEW YORK, NY 10027 USA

来源：

CHEMICAL PHYSICS LETTERS | 1992年 / 194卷 / 03期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0009-2614(92)85536-J

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 surface vibrations Of C1-C3 alkyl groups bound to a Cu (111) surface have been studied by high resolution electron energy loss spectroscopy. The alkyl groups were generated by the dissociative adsorption of alkyl iodides and bromides. All of the adsorbed alkyls show C-H stretching mode-softening, and isotope labelling studies indicate that the softened C-H bonds are those at the alpha-carbon (the one bonded to the surface). Our results suggest that charge donation from the metal to the antibonding orbital of the alkyl groups is the cause of the C-H stretching mode-softening.

引用

页码：208 / 212

页数：5

共 30 条

[1] THERMAL-DECOMPOSITION OF ALKYL-HALIDES ON ALUMINUM .1. CARBON HALOGEN BOND-CLEAVAGE AND SURFACE BETA-HYDRIDE ELIMINATION-REACTIONS [J].