Direct evidence of photochemical α-cleavage of benzoin in fluid solutions

Autor:	Motohiko Koyanagi, Hiroshi Futami, Masahiro Mukai, Seigo Yamauchi
Rok vydání:	1989
Předmět:	Radical General Physics and Astronomy Photochemistry law.invention Benzaldehyde chemistry.chemical_compound chemistry law Benzoin Excited state Physical and Theoretical Chemistry Triplet state Methylcyclohexane Electron paramagnetic resonance Stoichiometry
Zdroj:	Chemical Physics Letters. 154:577-580
ISSN:	0009-2614
DOI:	10.1016/0009-2614(89)87156-8
Popis:	By means of optical absorption, 1 NMR, and transient EPR techniques, the fate of diluted benzoin upon light irradiation to its S 1 (nπ*) state has been investigated in methylcyclohexane and benzene solutions at room temperature. The CIDEP spectrum of benzoin is observed for the first time, and the intermediate radicals involved are assigned. The overall results show that the main scheme of the photochemical reactions is the α-cleavage occurring in the excited triplet state of benzoin, as proved in the almost net emission pattern of the CIDEP spectra. A stoichiometric reaction leading to effective benzaldehyde formation is established for the benzoin solutions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d80af3e08b0b1e68643572de3d82172c https://doi.org/10.1016/0009-2614(89)87156-8 Zobrazit plný text záznamu