ELECTRON SPIN RESONANCE STUDIES ON THE RADICALS PRODUCED BY PHOTOREDUCTION OF PARADIAZINE N,N’-DIOXIDES

doi:10.7517/j.issn.1674-0475.1990.03.161

Imaging Science and Photochemistry ›› 1990, Vol. 8 ›› Issue (3): 161-170.DOI: 10.7517/j.issn.1674-0475.1990.03.161

ELECTRON SPIN RESONANCE STUDIES ON THE RADICALS PRODUCED BY PHOTOREDUCTION OF PARADIAZINE N,N’-DIOXIDES

WANG HAN-QING, LIN SHU-KUN

Lanzhou Institute of Chemical Physics. Academia Sinica, Lanzhou 730000, P. R. China

Received:1988-10-26 Revised:1989-06-09 Online:1990-08-20 Published:1990-08-20

Abstract

Abstract: Electron spin resonance spectroscopic studies were made on the in situ photolyzed samples of four paradiazine N,N’-dioxides prepared.All compounds gave stable nitroxyl radicals,by the photoreduction process,in which these radicals were obtained through abstraction of hydrogen from solvent molecules.Well-resolved ESR s pectra from these radicals were recorded.Also a free radical mechanism for the photoreduction of paradiazine N,N’-dioxides was suggested.

Key words: Paradiazine-N,N’-dioxides, photorearrangement, photoreduction, deoxygenation, hydrogen abstraction, radical mechanism

WANG HAN-QING, LIN SHU-KUN. ELECTRON SPIN RESONANCE STUDIES ON THE RADICALS PRODUCED BY PHOTOREDUCTION OF PARADIAZINE N,N’-DIOXIDES[J]. Imaging Science and Photochemistry, 1990, 8(3): 161-170.

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ELECTRON SPIN RESONANCE STUDIES ON THE RADICALS PRODUCED BY PHOTOREDUCTION OF PARADIAZINE N,N’-DIOXIDES

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