DISSOCIATION RATES OF INTERNAL-ENERGY-SELECTED METASTABLE C8H+8 IONS

被引：28

作者：

SMITH, D

BAER, T

WILLETT, GD

ORMEROD, RC

机构：

[1] Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill

来源：

INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES | 1979年 / 30卷 / 02期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0020-7381(79)80092-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

The dissociation rates of internal-energy-selected styrene and cyclo-octatetraene ions were measured by photoion-photoelectron coincidence with fragment ion time-of-flight analysis. In the energy range 1.5-2.1 eV above the dissociation threshold to form C6H6+ and C2H2, the two C8H8+ isomers have identical rates. This indicates that the ions rearrange to a common precursor prior to fragmentation. On the basis of thermochemistry and calculated rates using the RRKM theory, it is evident that cyclo-octatetraene rearranges to styrene, and that styrene is very close to the most stable ion structure for the C8H8+ isomers. © 1979.

引用

页码：155 / 163

页数：9

共 36 条

[1] UNIMOLECULAR ION DECOMPOSITIONS - DEPENDENCE OF RATE CONSTANTS ON ENERGY FROM CHARGE EXCHANGE EXPERIMENTS [J].