Abstract
Bound and excited negative ion states of p-fluoranil (FA), p-chloranil (CA), and p-bromanil (BA) are studied from experiments involving collisions of electrons, Na, K, and Cs beams with FA, CA, AND BA. Reaction thresholds for producing FA−, CA−, and BA− are determined as a function of the temperature of the target molecules. The electron affinities corresponding to 0 °K were measured to be 2.92±0.2 eV for FA, 2.76±0.2 eV for CA, and 2.44±0.2 eV for BA. FA, CA, and BA attach ∼ 0 eV electrons and FA attaches 0.5 eV electrons to form metastable parent negative ions with lifetimes in the millisecond range. These lifetimes are a function of the electron energy. Dissociative and nondissociative resonances observed via electron attachment to p-benzoquinone (PBQ) and the ’’anils’’ are correlated with the optically determined 2B3g′, 2B1u, and 2Au states of PBQ− and the anion radicals of several substituted quinones.
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Dates
Type | When |
---|---|
Created | 22 years, 5 months ago (Feb. 27, 2003, 4:26 p.m.) |
Deposited | 1 year, 6 months ago (Feb. 9, 2024, 1:54 p.m.) |
Indexed | 1 year, 2 months ago (June 6, 2024, 4:36 p.m.) |
Issued | 46 years, 11 months ago (Sept. 15, 1978) |
Published | 46 years, 11 months ago (Sept. 15, 1978) |
Published Print | 46 years, 11 months ago (Sept. 15, 1978) |
@article{Cooper_1978, title={Negative ion properties of fluoranil, chloranil, and bromanil: Electron affinities}, volume={69}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.436919}, DOI={10.1063/1.436919}, number={6}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Cooper, C. D. and Frey, W. F. and Compton, R. N.}, year={1978}, month=sep, pages={2367–2374} }