Gas-phase ion/molecule reactions in C2F4

被引：4

作者：

Hiraoka, K. ^{[1
]}

Mochizuki, N. ^{[1
]}

Wada, A. ^{[1
]}

Okada, H. ^{[1
]}

Ichikawa, T. ^{[1
]}

Asakawa, D. ^{[1
]}

Yazawa, I. ^{[1
]}

机构：

[1] Yamanashi Univ, Clean Energy Res Ctr, Kofu, Yamanashi 4008511, Japan

来源：

INTERNATIONAL JOURNAL OF MASS SPECTROMETRY | 2008年 / 272卷 / 01期

关键词：

high-pressure mass spectrometry; cluster ion; tetrafluoroethylene; halide ion;

D O I：

10.1016/j.ijms.2007.12.013

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：

Gas-phase ion/molecule reactions in tetrafluoroethylene (C2F4) were studied with a pulsed electron beam mass spectrometer. When a few Torr of major gas, N-2, containing 1-10 mTorr C2F4 was ionized by 2 keV electrons, CF3+ and C2F4+ were formed as major ions. CF3+ reacted with C2F4 rapidly to form C3F(7)(+). The cluster ion C3F7+(C2F4) started to appear below similar to 280 K. In the clustering reactions Of C3F7+ With C2F4, the equilibria could not be observed but the cluster ions C3F7+(CF4)(n) were found to grow very slowly at the expense of the smaller cluster ions C3F7+(C2F4)(n-1). The rate constant of reaction C2F4+ + C2F4 = C3F5+ + CF3 was measured to be (1.5 +/- 0.5) x 10(-11) cm(3)/molecules and found to be temperature-independent in the range of 310-180 K. The thermochemical stabilities of X-(C2F4)(n) (X- = F-, Cl- and Br-) were measured. A peculiar behavior in reaction of F- with C2F4 was observed. Two isomers for F-(C2F4) were predicted. (c) 2008 Published by Elsevier B.V.

引用

页码：22 / 28

页数：7

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