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Title: Some applications of mass spectrometry in organic chemistry
Author: Clarke, David Ross
Awarding Body: University of London
Current Institution: Imperial College London
Date of Award: 1970
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The existing information concerning substituent effects in the mass spectra of aromatic compounds is reviewed. The syntheses of representative compounds of the series 4-Y C6H4 (C6H5)CHCH2R are described and their mass spectra discussed. Particular reference is made to the correlation between activation energies and Hammett substituent constants for the process 14-Y C6H4(06H5)CHCH2Ph ⟶ 4-Y C6H4(C6H5)CH+ + PhCH2. The preparation and mass spectra of several benzyloxycarbonyl derivatives of L-ornithine are discussed and a corresponding account of some derived piperid-2-ones is presented with a view to making a structural assignment to a. new type of lipid known to contain L-ornithine. The final section deals with the fragmentation of several acetals and fatty acid methyl esters, induced by photon- and electron-impact at room temperature and at 150°C. The significant observation was confirmed that the photon-impact spectra show enhancement of the relative abundance of the molecular ion.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available