DOUBLE-TRAPPING OF TRIPLET BIRADICALS IN THE CLEAVAGE OF SPIROPYRANS AND SPIROOXAZINES

Authors
CAMPREDON M SAMAT A GUGLIEMETTI R ALBERTI A
Citation
M. Campredon et al., DOUBLE-TRAPPING OF TRIPLET BIRADICALS IN THE CLEAVAGE OF SPIROPYRANS AND SPIROOXAZINES, Gazzetta chimica italiana, 123(5), 1993, pp. 261-264
Citations number
33
Categorie Soggetti
Chemistry
Journal title
Gazzetta chimica italiana → ACNP
ISSN journal
00165603
Volume
123
Issue
5
Year of publication
1993
Pages
261 - 264
Database
ISI
SICI code
0016-5603(1993)123:5<261:DOTBIT>2.0.ZU;2-T
Abstract
Saturation with nitric oxide, NO, of oxygen-free benzene solutions of some nitrospiro-[indoline-pyrans], spiro[indoline-naphthoxazine] and s piro[indoline-pyridobenzoxazine] led to double-trapping of biradicals. The resulting species have been detected by means of EPR spectroscopy and identified as 7-membered cyclic alkyl alkoxy nitroxides on the ba sis of their spectral parameters. The process, which takes place in th e daylight and is not affected by UV irradiation, was not observed in spiropyrans not containing the indoline moiety.