Premium
Carbon randomization in the fragmentation of [C 4 H 9 ] + derived from t ‐butyl derivatives
Author(s) -
Leung Heiwun,
Tsang Chun Wai,
Harrison Alex. G.
Publication year - 1976
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.1210110615
Subject(s) - neopentane , fragmentation (computing) , mass spectrum , chemistry , analytical chemistry (journal) , ion , spectral line , carbon fibers , scrambling , physics , molecule , materials science , chromatography , organic chemistry , mathematics , algorithm , composite number , computer science , operating system , astronomy , composite material
Abstract The mass spectrum of 13 C centrally labeled neopentane has been re‐examined at a mass resolution sufficient to resolve 13 C‐CH mass doublets. Contrary to earlier low resolution results, the [C 3 H 5 ] + fragment ion is formed with 75% retention of the central carbon under all experimental conditions, indicating complete carbon scrambling in the fragmentation reaction [C 4 H 9 ] + →[C 3 H 5 ] + + CH 4 . The higher retention of the central carbon in [C 3 H 5 ] + in the mass spectra of (CH 3 ) 3 CCl and (CH 3 ) 3 CBr is shown to be due to the occurrence of the reaction sequence