Premium
Charge separation reactions of doubly charged benzene ions
Author(s) -
Richardson P. J.,
Eland J. H. D.,
Lablanquie P.
Publication year - 1986
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.1210210510
Subject(s) - ion , benzene , chemistry , hydrogen , kinetic energy , atomic physics , spectral line , synchrotron radiation , analytical chemistry (journal) , physics , nuclear physics , organic chemistry , chromatography , quantum mechanics , astronomy
Abstract Photoion‐photoion coincidence spectra of benzene and benzene‐ d 6 photoionized by He(II) light and synchrotron radiation show the existence of six major and eight minor charge‐separation reactions of the [C 6 H 6 ] 2+ ion. Three main groups of ion pairs are related to [C 3 H 3 ] + + [C 3 H 3 ] + , [C 2 H 3 ] + + [C 4 H 3 ] + and [CH 3 ] + + [C 5 H 3 ] + , with appearance energies of 32.2 ± 0.5 eV, 31.3 ± 0.5 eV and 28.4 ± 0.3 eV. The kinetic energy release is the same for all pairs within a group, irrespective of hydrogen number, but differs from group to group. Results are interpreted in terms of fast, direct charge separation of [C 6 H 6 ] 2+ , and subsequent hydrogen loss by the singly charged fragments.