Dissociative resonance capture

Assumed type of dissociative resonance capture Reference... 

In addition to formation of radical anions via process (2), they can sometimes also be generated by the dissociative resonance capture process... 

The dependence of upon E has been found to be linear, at least at all bar the highest energies, for quite a number of polyatomic molecules [310, 369, 675]. It is clear from the slopes of these plots that eqn. (42) does not, in general, hold for dissociative resonance captures. 

Electron affinity (EA) is a measure of the ability of a molecule to attach an electron. This value is equal to an adiabatic IE of the corresponding negative ion. EAs for some EHal2 have been derived from appearance energies of the corresponding anions formed by low-energy electron dissociative resonance capture from in the conrse... 

A different result was found from the ionization efficiency curves for CF4, The dissociative resonance capture formation of F from CF4 was found to have a maximum intensity at 7.1 eV (uncorrected). Dibeler, Reese and Mohler indicate this process occurs at 4.5 0.3 eV. The ratio of the ion currents of the F and F ions formed in this resonance region was found to be essentially independent of the F intensity in contrast to the observations just discussed for CN from CF3CN in the ion-pair formation region. 

A more general mechanism for the production of l from AZ may be formulated the singly-charged negative ion production may occur by a dissociative resonant capture reaction... 

Within the experimental errors in the measurements, the intensity ratio of C1 /CF from the SF6-Ca4 mixture was found to be constant and independent of the CF intensity over the range shown in Fig. 12. This result is in agreement with that found for CF4 in the dissociative resonant capture region, as mentioned above, and differs from the observations of CN formed in the ion-pair formation region. Further, whereas the C1 /CF intensity ratio is constant within each of the capture peaks, the C1 /CF ratio for the peak at 1.0 eV is twice as great as the C1 /CF ratio for the peak at 0.1 eV. Stuckey offered no explanation of this feature and it was not mentioned by Stuckey and Kiser in their brief report of the discovery of doubly-charged negative ions. 

Of course. Reactions (54) and (58) may be replaced by reactions that involve an appropriate dissociative resonant capture to yield the same ground state of 0 or... 

Reaction (66a) is a dissociative resonant capture. Reaction (66b) is shown as an ion-pair formation process induced by electron impact Reaction (66c) is electron capture by a molecule or a neutral fragment produced by a previous dissociative process. If the excited state of Tr lies significantly above the ground state,... 

Arsenic and Arsenides.—Appearance potentials for the negative ions As, AsJ, and As3, formed from As by dissociative resonance capture, have been measured, giving values of the standard heats of formation.615... 

The dissociative resonance capture takes place when low energy electrons of up to about 15 eV collide at low pressure with sample molecules ... 

In the mass spectrometer, one can observe the following reaction of the corresponding radical anion of (30) (this reaction could also occur by dissociative resonance capture, i.e., direct formation of the nitrobenzyl anion and a halide radical) ... 

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