FORMATION OF SIF2 IN THE INFRARED MULTIPHOTON DECOMPOSITION OF SI2F6 AND THE REACTIONS OF SIF2 WITH BR-2, NO2 AND C2H4

被引：9
|
作者：
SUGAWARA, KI [1 ]
ITO, F [1 ]
NAKANAGA, T [1 ]
TAKEO, H [1 ]
机构：
[1] NATL INST MAT & CHEM RES,TSUKUBA,IBARAKI 305,JAPAN
来源：
CHEMICAL PHYSICS LETTERS | 1995年 / 232卷 / 5-6期
关键词：
D O I：
10.1016/0009-2614(94)01384-8
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 infrared multiphoton decomposition of Si2F6 has been investigated by time-resolved infrared diode laser spectroscopy. Direct formation of SiF2 (X (1)A(1)) in the ground vibrational state and indirect formation via vibrational relaxation were found. Simultaneous formation of SiF4 with SiF2 was also observed, indicating that a 1,2-fluorine shift occurs in preference to Si-Si bond scission. The vibrational relaxation of SiF2 in H-2 was found to be about twenty times faster than that in N-2 because of resonant vibration-rotation energy transfer. The rate constants for the reactions of SiF2 with Br-2, NO2 and C2H4 were determined as (7.6 +/- 1.0) X 10(-13), (5.8 +/- 0.9) x 10(-13) and < 1 X 10(-15) cm(3) molecule(-1) s(-1), respectively, at room temperature.
引用
收藏
页码：561 / 566
页数：6
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