Unimolecular decomposition of energy-selected anisole ions. Breakdown graph and metastable decay rates |
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| Affiliation: | 1. School of Mechanical Engineering, Purdue University, West Lafayette, IN 47906, United States;2. School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30313, United States;3. Purdue Energetics Research Center, Purdue University, West Lafayette, IN 47906, United States |
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| Abstract: | The fragmentation behavior of the anisole ion (C6H5OCH+·3) was examined using threshold photoelectron-photoion coincident (TPEPICO) mass spectrometry. Four major fragments are observed in the ion time-of-flight spectra at photon energies less than 14 eV: C6H5O+ (m/z 93), C6H+7 (m/z 79), C6H+6 (m/z 78), and C5H+5 (m/z 65). Rate constants for the production of the ion m/z 78 near threshold were found to agree well with those calculated on the basis of RRKM theory. Most of the excess energy at threshold for this process is a result of the kinetic shift. |
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