PHOTOIONIZATION OF $CH_{3}NO_{2}$, $C_{2}H_{3}ONO_{2}$, AND $C_{2}H_{5}NO_{2}$, ELECTRON AFFINITIES OF $NO_{2}$ AND $NO_{3}$, AND THE HEAT OF FORMATION OF $NO_{2}$
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Date
1971
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Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
The photoionization mass spectra of methyl and ethyl nitrate were investigated. Using the appearance potential of $C_{2}H$$^{+}_{5}$ from $C_{2}H_{5}ONO_{2}$, combined with well established thermodynamic data, the heat of formation of $NO_{3}$ was found to be 10.8 $\pm$ 1.0 kcal/mole. Various negative ions can be formed by the transfer of “nearly-zero-energy” electrons from electronically excited argon atoms to a series of parent nitro and nitrate molecules. Consideration of the relative energetics of these reactions leads to limiting values for the electron affinities: E.A. (NO) $\geq$ 2.90 eV; 2.15 $\leq$ E.A. ($NO_{2}\pm\leq 2.4$ eV.
Description
Author Institution: Department of Chemistry, Michigan State University; Department of Chemistry, Argonne National Laboratory