Fragmentation of Energy-Selected Fluorobenzene Ion.

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概要

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• Dissociation of the fluorobenzene ion has been studied using threshold photoelectron–photoion coincidence (TPEPICO) mass spectrometry. The detailed breakdown curves were measured over internal energies from 0 to 9 eV. Asymmetric flight time distributions due to metastable dissociation were observed for the formations of C<SUB>6</SUB>H<SUB>5</SUB><SUP>+</SUP> and C<SUB>4</SUB>H<SUB>3</SUB>F<SUP>+</SUP>, and their absolute decay rate constants were derived from their flight time distributions. The information-theoretical approach has been employed for the analysis of kinetic energy release distribution (KERD). The results of surprisal analysis demonstrated that experimental KERDs are in good agreement with the predictions based on the statistical theory of mass spectra (QET). The heat of formation of C<SUB>4</SUB>H<SUB>3</SUB>F<SUP>·+</SUP> has been estimated to be 222±2 kcal mol<SUP>−1</SUP>.

• 公益社団法人 日本化学会の論文

著者

• NISHIMURA Toshihide

  Upjohn Pharmaceuticals Limited, Tsukuba Research Laboratories

• Meisels Gerry

  Office Of The Provost University Of South Florida

• Niwa Yoshio

  National Chemical Laboratory for Industry

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