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Fragmentation processes of 1,2‐diphenoxyethane and 2‐phenoxyethanol by electron impact
Author(s) -
Sekiguchi Osamu,
Ayuzawa Terukazu,
Fujishige Masao,
Yanagisawa Tamae,
Tajima Susumu
Publication year - 1995
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.1290090117
Subject(s) - chemistry , fragmentation (computing) , electron ionization , ion , deuterium , mass spectrometry , metastability , kinetic energy , polyatomic ion , mass spectrum , hydrogen atom , molecule , analytical chemistry (journal) , hydrogen , ionization , alkyl , atomic physics , organic chemistry , chromatography , physics , quantum mechanics , computer science , operating system
The unimolecular fragmentation processes of 1,2‐diphenoxyethane (1) and 2‐phenoxyethanol (2) upon electron impact were investigated by a combination of mass‐analyzed ion kinetic energy (MIKE) spectrometry, deuterium‐labelling, high resolution mass spectrometry, and kinetic energy release (KER) measurement. The MIKE spectrum and the KER measurement indicate that the predominant fragment ion at m / z 120 was generated from metastable 1 +· ions via loss of a phenol molecule (C 6 H 6 O, 7), and that it has the same structure as the molecular ion of 2,3‐dihydrobenzofuran (C 8 H 8 O, 3). The metastable 2 +· ion eliminates C 2 H 4 O and C 2 H 3 O to produce product ions at m / z 94 (C 6 H 6 O +· , 7 +· ) and 95 (C 6 H 7 O + ) with single and double hydrogen atom transfer, respectively. These reactions occur through some complex rearrangement reactions.