Abstract
There exists in the literature an extensive body of thermochemical data for positive ions in the gas phase.1 These data have been derived primarily from ionization potentials and appearance potentials measured by electron impact and photoionization mass spectrometry. In contrast to this, very little is known about the thermochemistry of negative ions. Negative ions can be detected by electron impact and photoionization mass spectrometry, but the cross section for their production is typically more than a hundred times less than for production of positive ions. Furthermore, negative ions produced by electron impact often have excess translational energy which hinders their collection in sector-type instruments. For these reasons, measurements of thresholds for production of negative ions has not been nearly as fruitful as for positive ions.
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© 1979 Plenum Press, New York
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Mclver, R.T. (1979). Equilibrium Studies of Negative Ion-Molecule Reactions. In: Ausloos, P. (eds) Kinetics of Ion-Molecule Reactions. NATO Advanced Study Institutes Series, vol 40. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-2931-2_13
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DOI: https://doi.org/10.1007/978-1-4613-2931-2_13
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