Mass spectrometry of resonance capture of electrons and photo-electron spectroscopy of molecules of ethylene oxide, ethylene sulfide, and their derivatives

Conclusions

• 1. The formation of resonance states of negative molecular ions by interaction of an electron with the molecules of ethylene oxide, ethylene sulfide, and their derivatives in the high-energy region takes place through a mechanism of electronically excited Feschbach resonance with excitation of an electron from several occupied molecular orbitals to one and the same unoccupied molecular orbital, which coincides with the unoccupied molecular orbital of the first singlet transition of the molecule. An additional electron is captured in a fully symmetric Rydberg orbital that is formed in the field of the excited molecule.

• 2. The dissociation of the negative molecular ions proceeds in accordance with the principle of orbital correlation, and the symmetry of their electronic state is determined by the symmetry of the occupied molecular orbital (from which the electron is excited) and the symmetry of the unoccupied molecular orbital (into which the electron passes).

• 3. In the molecules of 2,3-epoxypropyl ethyl sulfide, glycidol, and epichlorohydrin, the unshared electron pairs of the oxygen atom of the three-membered heterocycle and the sulfur atom of the substituent (or the oxygen or chlorine atom of the substituent) do not interact with each other to any appreciable degree.