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Secondary isotope effects in the mass spectra of C 2 D 5 OC 2 H 5 and CD 3 CH 2 OC 2 H 5
Author(s) -
Russell Morley E.
Publication year - 1993
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.1210280707
Subject(s) - ion , isotope , chemistry , analytical chemistry (journal) , spectral line , kinetic isotope effect , mass spectrum , atomic physics , physics , deuterium , nuclear physics , organic chemistry , astronomy , chromatography
Secondary isotope effects were examined in the loss of methyl from the molecular ions of C 2 D 5 OC 2 H 5 and CD 3 CH 2 OC 2 H 5 for ion source processes and collisional activation (CA) processes. In the ion source loss of CH 3 was slightly favored over loss of CD 3 , but in CA the CH 3 loss was favored to a much larger extent than expected. A possible explanation is given which invokes an energy distribution function peaked near the appearance energy for the methyl loss process.