TRANSLATIONAL ENERGY-DISTRIBUTION FROM C2H2 + H-NU(193.3 NM) -] C2H + H

被引：50

作者：

SEGALL, J ^{[1
]}

WEN, Y ^{[1
]}

LAVI, R ^{[1
]}

SINGER, R ^{[1
]}

WITTIG, C ^{[1
]}

机构：

[1] UNIV SO CALIF,DEPT CHEM,LOS ANGELES,CA 90089

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1991年 / 95卷 / 21期

关键词：

D O I：

10.1021/j100174a015

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：

We report the center-of-mass translational energy distribution for 193.3-nm photolysis of expansion-cooled C2H2, using high-n Rydberg-level excitation of nascent H atoms to facilitate high-resolution time-of-flight measurements. The observed resolution of approximately 200 cm-1 is presently limited by the ArF photolysis laser, whose band width is approximately 200 cm-1. The reported distribution clearly resolves a C2H bending progression (nu-2 approximately 400 cm-1), which reflects the trans-bent C2H2 excited state. A definitive assignment of all features is still not possible on the basis of currently available information on C2H. These measurements yield an upper bound to D0 of 131.8 +/- 0.5 kcal mol-1.

引用

页码：8078 / 8081

页数：4

共 29 条

[1] PHOTODISSOCIATION OF ACETYLENE - DETERMINATION OF D-0(0)(HCC-H) BY PHOTOFRAGMENT IMAGING [J].