RESONANT DISSOCIATIVE ATTACHMENT OF ELECTRONS TO MOLECULES OF 5-MEMBERED HETEROCYCLIC-COMPOUNDS AND LACTAMS

Mass spectra of resonant dissociative electron attachment (RDEA) have been recorded for molecules of furan, thiophene, selenophene, pyrrole, N-methylpyrrole, and of lactam series (CH2)nCONH (n = 3,5,7,11), (CH2 )5CONCOMe.. For four molecules of the lactam series photoelectron (PE) spectra have been obtained, and spectral bands between 9 and 12 eV ha ve been interpreted using MNDO calculations. Electronic structures of molecular negative ions (M-.) in the resonant states have been identif ied. These states were found to be electronically excited Feshbach res onances. Their parent states are the first triplet state and a series of singlet states of the molecules.