Valence ionic states and dissociative photoionization of CH3CFCl2 with synchrotron radiation

Su Yu Chiang; Tsai Te Wang; Jen-Shiang Yu; Chin Hui Yu

doi:10.1016/S0009-2614(00)01019-8

Valence ionic states and dissociative photoionization of CH₃CFCl₂ with synchrotron radiation

Su Yu Chiang^*, Tsai Te Wang, Jen-Shiang Yu, Chin Hui Yu

^*Corresponding author for this work

Institute of Bioinformatics and Systems Biology

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

Valence ionic states and dissociative photoionization of CH₃CFCl₂ in 11-19 eV are investigated with threshold photoelectron and photoionization mass spectrometry (PIMS). Valence ionic states are assigned on comparison of vertical ionization energies determined in the threshold photoelectron spectrum with theoretically predicted values. Major fragments CH₃CFCl⁺, CH₂CCl⁺, and CH₂CF⁺ were observed with their respective appearance energies 11.33, 13.71, and 14.18 eV, but CH₃CFCl₂ ⁺ was absent. A mechanism for CH₃CFCl₂ to form CH₃CFCl⁺+Cl is proposed. At greater ionization energies, H migration followed by HX elimination of CH₃CFCl⁺ to form CH₂CCl⁺+HF or CH₂CF⁺+HCl takes place.

Original language	English
Pages (from-to)	185-190
Number of pages	6
Journal	Chemical Physics Letters
Volume	329
Issue number	3-4
DOIs	https://doi.org/10.1016/S0009-2614(00)01019-8
State	Published - 20 Oct 2000

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@article{64e224ba1b154d5eb082027325148122,

title = "Valence ionic states and dissociative photoionization of CH3CFCl2 with synchrotron radiation",

abstract = "Valence ionic states and dissociative photoionization of CH3CFCl2 in 11-19 eV are investigated with threshold photoelectron and photoionization mass spectrometry (PIMS). Valence ionic states are assigned on comparison of vertical ionization energies determined in the threshold photoelectron spectrum with theoretically predicted values. Major fragments CH3CFCl+, CH2CCl+, and CH2CF+ were observed with their respective appearance energies 11.33, 13.71, and 14.18 eV, but CH3CFCl2 + was absent. A mechanism for CH3CFCl2 to form CH3CFCl++Cl is proposed. At greater ionization energies, H migration followed by HX elimination of CH3CFCl+ to form CH2CCl++HF or CH2CF++HCl takes place.",

author = "Chiang, {Su Yu} and Wang, {Tsai Te} and Jen-Shiang Yu and Yu, {Chin Hui}",

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T1 - Valence ionic states and dissociative photoionization of CH3CFCl2 with synchrotron radiation

AU - Chiang, Su Yu

AU - Wang, Tsai Te

AU - Yu, Jen-Shiang

AU - Yu, Chin Hui

PY - 2000/10/20

Y1 - 2000/10/20

N2 - Valence ionic states and dissociative photoionization of CH3CFCl2 in 11-19 eV are investigated with threshold photoelectron and photoionization mass spectrometry (PIMS). Valence ionic states are assigned on comparison of vertical ionization energies determined in the threshold photoelectron spectrum with theoretically predicted values. Major fragments CH3CFCl+, CH2CCl+, and CH2CF+ were observed with their respective appearance energies 11.33, 13.71, and 14.18 eV, but CH3CFCl2 + was absent. A mechanism for CH3CFCl2 to form CH3CFCl++Cl is proposed. At greater ionization energies, H migration followed by HX elimination of CH3CFCl+ to form CH2CCl++HF or CH2CF++HCl takes place.

AB - Valence ionic states and dissociative photoionization of CH3CFCl2 in 11-19 eV are investigated with threshold photoelectron and photoionization mass spectrometry (PIMS). Valence ionic states are assigned on comparison of vertical ionization energies determined in the threshold photoelectron spectrum with theoretically predicted values. Major fragments CH3CFCl+, CH2CCl+, and CH2CF+ were observed with their respective appearance energies 11.33, 13.71, and 14.18 eV, but CH3CFCl2 + was absent. A mechanism for CH3CFCl2 to form CH3CFCl++Cl is proposed. At greater ionization energies, H migration followed by HX elimination of CH3CFCl+ to form CH2CCl++HF or CH2CF++HCl takes place.

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