CHARACTERISTIC FEATURES OF PHOTOCHEMICAL CONVERSIONS OF C-(2-FURYL -5-NITRO)-N-PHENYL- AND C,N-DI(p-BROMPHENYL)NITRONES AND IN LIQUID AND CRYSTAL PHASES

A.N. Utenyshev, I.I. Chuev, S.M. Aldoshin

Institute of Chemical Physics in Chernogolovka, Russian Academy of Sciences, 142432 Chernogolovka, Moscow Region, Russian Federation. Fax: 007(096) 515 3588.
E-mail: atom@icp.ac.ru

Photoconversions of I and II were studied in solutions with [1,2]

I

II

different polarity. The UF spectrum of I unlike that of II, shows a long-wavelength absorptions band, which is observed only in polar solutions. This band corresponds to the intermediate product of the photochemical conversion of I. Based on the results of quantum-chemical calculations, a scheme of probable photoconversion of I in polar solvents and the molecular structure of the intermediate were suggested. Based on data of X-ray analysis of I and II and results of calculations of model compounds, it was demonstrated that solid-state photoconversion, which is associated with the formation of oxaziridine heterocycle, can occur.

1. A.N. Utenyshev & S.M. Aldoshin, Izvestiya Akademii Nauk. Seriya Khimicheskaya, N. 11. (1996) 2670-2675
2. A.N. Utenyshev & S.M. Aldoshin, I.I. Chuev, L.O. Atovmyan. Mol. Cryst. Liq. Cryst. V.257 (1994) 259-267.