A neutralization‐reionization study of [C3Hn]+ ions, n = 6−0, shows that neutralization efficiencies are larger for hydrocarbon radical cations than they are for even‐electron carbocations with one more H atom. Reionization efficiencies to positive ions do not depend appreciably on the electronic properties of the neutral species undergoing reionization. However, reionization efficiencies to negative ions increase dramatically with the degree of unsaturation, by nearly two orders of magnitude, from C3H6 to C3. All C3Hn neutrals studied survive intact neutralization to produce a considerable fraction of stable, non‐dissociating [C3Hn]+ upon cationization. All C3Hn radicals (n = 5, 3, 1) can be transferred collisionally to stable even‐electron anions. For the C3Hn hydrocarbon molecules studied (n = 6, 4, 2, 0) the stability of the molecular radical anion increases substantially with the degree of unsaturation.
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Wesdemiotis et al. (1988) studied this question.
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