Selected Ion Flow Tube Study of Ion鈥揗olecule Reactions of N+(3P) and Kr+ with C3 Hydrocarbons Propane, Propene, and Propyne
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- 作者：Kseniya Dryahina ; Barbara K. Cunha de Miranda ; Patrik S虒pane虒l ; Jan Z虒abka ; Christian Alcaraz ; Zdenek Herman
- 刊名：Journal of Physical Chemistry A
- 出版年：2011
- 出版时间：June 30, 2011
- 年：2011
- 卷：115
- 期：25
- 页码：7310-7315
- 全文大小：730K
- 年卷期：v.115,no.25(June 30, 2011)
- ISSN：1520-5215
文摘
Reactions of 14N+(3P), 15N+(3P), and Kr+ with propane, propene, and propyne were studied using the selected ion flow tube, SIFT, technique. Thermal rate constants in all N+/C3 systems were k = (2 卤 0.4) 脳 10鈥? cm3 molecule鈥? s鈥?, close to the collisional rate constants. With propane and propene, only hydrocarbon ions were found among the products of reactions with N+; in propyne about 15% of the products were N-containing ions (C3H2N+, C2H4N+, C2H3N+, C2H2N+), and the rest were hydrocarbon ions. A comparison with product ions from electron transfer between Kr+ (of recombination energy similar to that for N+(3P)) and the C3 hydrocarbons and further analysis of the results led to an estimation of an approximate ratio of electron transfer vs hydride-ion transfer reactions leading to the hydrocarbon product ions: in propane the ratio was 2:1, in propene 3:1, and in propyne 5:1. A fraction of product ions resulted from reactions leading to the excited neutral product N*.