Место издания:Saint Petersburg State University Санкт-Петербург
Первая страница:122
Последняя страница:123
Аннотация:It was concluded that the structure of the radical-cation (RC) dramatically affects the further mechanism of transformations of these RCs under the action of light. The quantum chemical calculations carried out for different types of RC of oxiranes shown that upon the radiolysis either RC with elongated bond between C atoms in oxirane ring or RC in the ring-open form is formed.The using of UV-visible absorption and Electron Paramagnetic Resonance spectroscopy allowed us to determine the sequence of photochemical transformations of formed RCs. It was concluded that the further transformations of RC cardinally depend on the nature of substituent at the oxirane ring.The observed commonality in the nature of the primary indirect ionization products for variousoxirane-derived RCs cannot be extended to other parameters to predict the directions of their phototransformations where these species react along different pathways depending on their structures.
