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Thermochemistry and metastable energy release for the dissociation [C 3 H 7 ] + → [C 3 H 5 ] + + H 2
Author(s) -
Holmes J. L.,
Weese G. M.
Publication year - 1974
Publication title -
organic mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0030-493X
DOI - 10.1002/oms.1210090612
Subject(s) - metastability , dissociation (chemistry) , kinetic energy , thermochemistry , ion , fragmentation (computing) , radical , atomic physics , bond dissociation energy , chemistry , activation energy , analytical chemistry (journal) , physics , computer science , operating system , organic chemistry , quantum mechanics , chromatography
The reverse activation energy, E rev , for the dissociation [C 3 H 7 ] + → [C 3 H 5 ] + + H 2 has been determined as 0.24 ± 0.06 eV from measurements of the AP of [C 3 H 5 ]+ produced by electron‐impact from thermally generated sec‐C 3 H 7 radicals. The energy release observed in the corresponding metastable dissociation is 0.21 ± 0.01 eV, indicating that virtually all of E rev is partitioned as translational Kinetic energy of the fragmentation products. The metastable ion peak shape is also discussed with respect to the evaluation of the energy release.