PHOTO-IONIZATION AND THRESHOLD PHOTOELECTRON - PHOTO-ION COINCIDENCE STUDY OF PROPYNE FROM ONSET TO 20-EV

被引：57

作者：

PARR, AC ^{[1
]}

JASON, AJ ^{[1
]}

STOCKBAUER, R ^{[1
]}

MCCULLOH, KE ^{[1
]}

机构：

[1] NBS,NATL MEASUREMENT LAB,WASHINGTON,DC 20234

来源：

INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES | 1979年 / 30卷 / 3-4期

关键词：

D O I：

10.1016/0020-7381(79)83009-0

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：

Photoionization efficiency curves are obtained for propyne and its fragments C3H3+, C3H2, and C3H+ from threshold to 20 eV. Threshold photoelectron spectra and breakdown curves are given over the same energy range. The adiabatic ionization potential of the parent molecule, the appearance potentials of the fragments and the derived heats of formation of the ionic species are determined. The breakdown curve is almost identical to that obtained previously for allene [11] when the different heats of formation of the neutral molecules are taken into account. This suggests that the propyne ion isomerizes to the allene ion before fragmentation. © 1979.

引用

页码：319 / 330

页数：12