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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Selected ion flow tube study of ion-molecule reactions of N ~+(~3P) and Kr~+ with C_3 hydrocarbons propane, propene, and propyne
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Selected ion flow tube study of ion-molecule reactions of N ~+(~3P) and Kr~+ with C_3 hydrocarbons propane, propene, and propyne

机译：选择离子流管研究N〜+（〜3P）和Kr〜+与C_3烃丙烷，丙烯和丙炔的离子分子反应

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摘要

Reactions of ~(14)N~+(~3P), ~(15)N ~+(~3P), and Kr~+ with propane, propene, and propyne were studied using the selected ion flow tube, SIFT, technique. Thermal rate constants in all N~+/C_3 systems were k = (2 ± 0.4) × 10~(-9) cm~3 molecule~(-1) s ~(-1), 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 (C_3H_2N~+, C_2H_4N ~+, C_2H_3N~+, C_2H _2N~+), 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 C_3 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.
机译：使用选定的离子流管SIFT技术研究了〜（14）N〜+（〜3P），〜（15）N〜+（〜3P）和Kr〜+与丙烷，丙烯和丙炔的反应。所有N〜+ / C_3系统的热速率常数均为k =（2±0.4）×10〜（-9）cm〜3分子〜（-1）s〜（-1），接近碰撞速率常数。在丙烷和丙烯中，与N〜+的反应产物中仅发现烃离子;在丙炔中，约15％的产物为含N离子（C_3H_2N〜+，C_2H_4N〜+，C_2H_3N〜+，C_2H _2N〜+），其余为烃离子。通过比较Kr〜+（复合能类似于N〜+（〜3P）的重组能）与C_3碳氢化合物的电子转移产物离子，并对结果进行进一步分析，可以估算出电子转移与氢化物离子转移反应导致烃产物离子：丙烷中的比例为2：1，丙烯中的比例为3：1，丙炔中的比例为5：1。一部分产物离子是由反应产生的，导致激发出中性产物N。

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