Metastable anions of dinitrobenzene: Resonances for electron attachment and kinetic energy release
Attachment of free, low-energy electrons to dinitrobenzene (DNB) in the gas phase leads to DNB − as well as several fragment anions. DNB − , (DNB-H) − , (DNB-NO) − , (DNB-2NO) − , and (DNB-NO 2 ) − are found to undergo metastable (unimolecular) dissociation. A rich pattern of resonances in the yield...
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Veröffentlicht in: | The Journal of chemical physics 2010-12, Vol.133 (24), p.244302-244302-9 |
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Hauptverfasser: | , , , , , , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
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Zusammenfassung: | Attachment of free, low-energy electrons to dinitrobenzene (DNB) in the gas phase leads to DNB
−
as well as several fragment anions. DNB
−
, (DNB-H)
−
, (DNB-NO)
−
, (DNB-2NO)
−
, and (DNB-NO
2
)
−
are found to undergo metastable (unimolecular) dissociation. A rich pattern of resonances in the yield of these metastable reactions versus electron energy is observed; some resonances are highly isomer-specific. Most metastable reactions are accompanied by large average kinetic energy releases (KER) that range from 0.5 to 1.32 eV, typical of complex rearrangement reactions, but (1,3-DNB-H)
−
features a resonance with a KER of only 0.06 eV for loss of NO. (1,3-DNB-NO)
−
offers a rare example of a sequential metastable reaction, namely, loss of NO followed by loss of CO to yield C
5
H
4
O
−
with a large KER of 1.32 eV. The G4(MP2) method is applied to compute adiabatic electron affinities and reaction energies for several of the observed metastable channels. |
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ISSN: | 0021-9606 1089-7690 1089-7690 |
DOI: | 10.1063/1.3514931 |