Изучение процессов фрагментации диазосоединений при резонансном захвате электронов

Mass spectra of phthalymidoalkyl-a-diazoketones were obtained and quantum-chemical calculations by using Hartry-Fock and density functional theory methods were carried out. The most abundant ion in negative ion mass spectrum is due to the loss of N2 molecule followed by cyclopropanone molecule abstraction [M-N2-cyclo-C3H3RO]at 0.3 eV. Herewith the loss of H-atom occures from b-position of benzene ring to one of the CO-groups of phthalymide fragment. Autodetachment lifetime of methyl esters of phthalyl aminoacids is increased by the raise of a number of methylene groups in alkyl chain. Such dependence is not observed for the phthalyl aminoacids. Metastable transitions under resonance electron capture of N-butylphthalymide molecules were revealed.