Fragmentation Process of Benzenedicarboxylic Acid Dimethyl Esters

Fragmentation process of 1,2-([1]), 1,3-([2]) and 1,4-([3]) benzenedicarboxylic acid dimethyl esters by electron impact has been investigated by using deuterium labelling techniques, ion kinetic energy and mass analyzed ion kinetic energy spectra. The fragmentation process of [1] is somewhat distinc...

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Bibliographic Details
Published in:Journal of the Mass Spectrometry Society of Japan 1986, Vol.34(2), pp.99-105
Main Authors: Tajima, Susumu, Tobita, Seiji, Negishi, Akio, Tsuchiya, Toshikazu
Format: Article
Language:English
Subjects:
Deuterim labelling
Heats of formation
IKE and MIKE spectra
Kinetic energy release
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Summary:Fragmentation process of 1,2-([1]), 1,3-([2]) and 1,4-([3]) benzenedicarboxylic acid dimethyl esters by electron impact has been investigated by using deuterium labelling techniques, ion kinetic energy and mass analyzed ion kinetic energy spectra. The fragmentation process of [1] is somewhat distinct from those of [2] and [3], due to the interaction of each substituent (that is, an ortho effect). By taking thermochemical data into account, it is demonstrated that the structure of the intermediate ion, [C8H5O2]+ (m/z 133), generated from [1], is the same as that of the ion at m/z 133 due to loss of a hydrogen atom from the molecular ion of 1,2-benzenedicarbaldehyde, ([4]).
ISSN:1340-8097
1880-4225
DOI:10.5702/massspec.34.99