The rate constants for the reactions between CDitnH-itn+ and O have been measured and found to be fast, independent of isotope.The branching ratio for these reactions has been found to be statistical. Since decay of metastable triplet CD2HO+ shows a large isotope effect, it was thought that the present reactions might also do so. The fact that the present experiments do not show this large isotope
测量了CD itn H - itn +和O之间反应的速率常数,发现该速度常数快,与同位素无关,已发现这些反应的支化比是统计的。由于亚稳态三重态CD 2 HO +的衰变显示出较大的同位素效应,因此认为目前的反应也可以这样做。本实验未显示出如此大的同位素效应这一事实归因于反应CH 3 + + O←HCO + + H 2的放热性大,这打开了一些不涉及亚稳态三重态CD 2 HO +的替代途径。 作为中间体。
<sup>15</sup>N<sup>+</sup> + CD<sub>4</sub> and O<sup>+</sup> + <sup>13</sup>CO<sub>2</sub> State-Selected Ion−Molecule Reactions Relevant to the Chemistry of Planetary Ionospheres
The dissociative photoionization of N2 and O2 by synchrotron radiation in coincidence with threshold photoelectrons is used to produce state-selected N+ and O+ atomic ions to study their reactivity. A pure selection of their ground state, N+(3P) and O+(4S), or excited states, N+(1D), O+(2D), and O+(2P), is obtained by the choice of the photon energy and by further discrimination of atomic ions produced