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The mass spectra of isomeric hydrocarbons—II: The C 5 H 8 S isomers, spiropentane, cyclopentene, 1,3‐pentadiene and isoprene; The mechanisms and energetics of their fragmentations
Author(s) -
Holmes J. L.
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.1210080127
Subject(s) - cyclopentene , isoprene , chemistry , fragmentation (computing) , mass spectrum , ion , deuterium , molecule , hydrogen , photochemistry , computational chemistry , stereochemistry , organic chemistry , atomic physics , physics , catalysis , computer science , copolymer , operating system , polymer
The mass spectra of spiropentane, cyclopentene, 1,3‐pentadiene (piperylene), isoprene and some deuterium labelled analogues have been studied. The heats of formation of the molecular ions and the major daughter ions [C 5 H 7 ] + and [C 4 H 5 ] + have been estimated. Fragmentation of these molecules mostly proceeds via common intermediates in which hydrogen atoms have lost their positional identity. Only spiropentane displays any specific fragmentation behaviour related to its ground state geometry.