Vibrational and rotational energy distributions of CH3 and IF formed in the reactions of F atoms with CH4 and CH3I

Article abstract of DOI:10.1063/1.458512

The two reactions F + CH4 -> CH3 + HF (1) and F + CH3I -> CH3 + IF (2) have been investigated by using time-resolved diode laser absorption spectroscopy to probe the reaction products CH3 and IF.The fluorine atoms have been generated by the pulsed CO2 laser photolysis of SF6 in the presence of CH4 or CH3I at a total pressure of 5 Pa.Rotational lines of CH3 in the ν₂ = 1-0, 2-1, and 3-2 bands (out-of-plane bending vibration) and those of IF in the ν = 1-0, 2-1, 3-2, 4-3, 5-4, and 6-5 bands have been observed and analyzed to determine time-dependent product energy dist ributions.No clear evidence for population inversion has been found in the vibrational levels of both CH3 and IF.Nascent vibrational distributions of ν₂ = 0:1:2 of CH3 are 1:0.36:0.15 for reaction (1) and 1:0.32:0.14 for reaction (2), and that of IF = ν = 0:1:2:3:4:5 is 1:0.70:0.40:0.22:0.10:0.04.The nascent CH3 produced in reaction (1) is rotationally cold (around room temperature) and only 3 percent and 2 percent of total available energy are partitioned to the ν₂ vibrational mode and rotational motion of CH3, respectively.The vibrational and rotational energy distributions of CH3 and IF produced in reaction (2) have been well reproduced by a statistical model calculation.

Full text of DOI:10.1063/1.458512

Vibrational and rotational energy distributions of CH3 and IF formed in the reactions
of F atoms with CH4 and CH3I
Koichi Sugawara, Fumiyuki Ito, Taisuke Nakanaga, Harutoshi Takeo, and Chi Matsumura
Citation: The Journal of Chemical Physics 92, 5328 (1990); doi: 10.1063/1.458512
View online: http://dx.doi.org/10.1063/1.458512
View Table of Contents: http://scitation.aip.org/content/aip/journal/jcp/92/9?ver=pdfcov
Published by the AIP Publishing
Articles you may be interested in
Photofragmentation of CH3I: Vibrational distribution of the CH3 fragment
J. Chem. Phys. 75, 3838 (1981); 10.1063/1.442538
Vibrational energy distribution of the CH3 radical photodissociated from CH3I
J. Chem. Phys. 73, 3810 (1980); 10.1063/1.440611
Laserinduced fluorescence study of the reactions of F atoms with CH3I and CF3I
J. Chem. Phys. 72, 1128 (1980); 10.1063/1.439254
On the products’ translational distribution for the reactions of CH3I and CF3I with K and Ba
J. Chem. Phys. 67, 5809 (1977); 10.1063/1.434788
Products' translational energy and c.m. angular distribution vs collision energy for the Rb + CH3I reaction
J. Chem. Phys. 61, 4101 (1974); 10.1063/1.1681705
This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
86.29.74.125 On: Fri, 16 May 2014 13:06:08

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
86.29.74.125 On: Fri, 16 May 2014 13:06:08

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
86.29.74.125 On: Fri, 16 May 2014 13:06:08

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
86.29.74.125 On: Fri, 16 May 2014 13:06:08

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
86.29.74.125 On: Fri, 16 May 2014 13:06:08

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
86.29.74.125 On: Fri, 16 May 2014 13:06:08

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
86.29.74.125 On: Fri, 16 May 2014 13:06:08

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
86.29.74.125 On: Fri, 16 May 2014 13:06:08

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
86.29.74.125 On: Fri, 16 May 2014 13:06:08

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
86.29.74.125 On: Fri, 16 May 2014 13:06:08

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
86.29.74.125 On: Fri, 16 May 2014 13:06:08