کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9585385 | 1505782 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental and quantum-chemical studies on dissociative photoionization of c-C2H4S
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The dissociative photoionization of thiirane (c-C2H4S) in a region â¼9-20 eV was investigated with photoionization mass spectroscopy and calculations of molecular energies with the Gaussian-3 method. An adiabatic ionization energy of 9.051 eV for c-C2H4S agrees with a prediction of 9.07 eV for formation of c-C2H4S+; predictions of energies of formation of ring-opened isomers CH3CHS+, CH2CHSH+ and CH2SCH2+ are 8.85, 8.91 and 9.37 eV, respectively. Major fragment ions C2H3S+, C2H2S+, HCS+, H2S+ and C2H3+ were observed with their respective appearance energies at 10.71, 13.07, 11.13, 11.96 and 12.58 eV. Based on comparison of determined appearance energies and predicted reaction energies, we established six dissociation channels c-C2H4S+ â CH3CS+ + H, HCS+ + CH3, H2S+ + C2H2, C2H3+ + HS, CH2CS+ + H2 and CHCSH+ + H2. Ring-opening and H migration are involved in these processes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volumes 144â147, June 2005, Pages 223-226
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volumes 144â147, June 2005, Pages 223-226
نویسندگان
Su-Yu Chiang, Yung-Sheng Fang,