Production processes of H(D) atoms in the reactions of NO(Σ) with C2H2, C2H4, H2O, and their isotopic variants
作者:Hironobu Umemoto、Naoki Terada、Kunikazu Tanaka、Toshiyuki Takayanagi、Yuzuru Kurosaki、Keiichi Yokoyama
DOI:10.1016/s0301-0104(00)00184-1
日期:2000.9
The production of H(D) atoms was identified in the reactions of NO with C2H2, C2H4, H2O, and their isotopic variants. By measuring the Doppler profiles, the translational energies of H(D) atoms were determined. As for C2H2 and H2O, around 1/4 of the NO(A2Σ+) energy is partitioned into the translational mode, while the ratio is around 1/7 for C2H4. Such a large partitioning of the available energy into
在NO与C 2 H 2,C 2 H 4,H 2 O及其同位素变体的反应中鉴定出H(D)原子的产生。通过测量多普勒轮廓,确定了H(D)原子的平移能。至于Ç 2 ħ 2和H 2 O,围绕NO(A的1/4 2 Σ +)能量被划分成平移模式,而比例大约是1/7对C 2 H ^ 4。可用能量如此大的分配到平移模式无法用能量转移后的C–H(OH)键断裂来解释。氮化合物(例如ONC 2 H和HONO)必须作为副产物生产。测得的平移能量比统计上预期的要大得多,这表明中间物种是短命的。在平均平移能或相对产率中没有观察到大的同位素效应。诸如隧道效应之类的量子效应并未发挥重要作用。从头开始进行分子轨道计算以表征这些反应过程。