PULSED-LASER PHOTOLYSIS OF BIS(2-BROMOBENZOYL) PEROXIDE - STRUCTURE OF 2-BROMOBENZOYLOXYL RADICALS AND CARBON BROMINE BOND-CLEAVAGE

Authors
WANG J ITOH H TSUCHIYA M TOKUMARU K SAKURAGI H IWAIZUMI M YAMAUCHI S
Citation
J. Wang et al., PULSED-LASER PHOTOLYSIS OF BIS(2-BROMOBENZOYL) PEROXIDE - STRUCTURE OF 2-BROMOBENZOYLOXYL RADICALS AND CARBON BROMINE BOND-CLEAVAGE, Chemical physics letters, 232(3), 1995, pp. 278-282
Citations number
26
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
Journal title
Chemical physics letters → ACNP
ISSN journal
00092614
Volume
232
Issue
3
Year of publication
1995
Pages
278 - 282
Database
ISI
SICI code
0009-2614(1995)232:3<278:PPOBP->2.0.ZU;2-E
Abstract
On pulsed laser photolysis of bis(2-bromobenzoyl) peroxide (2-BrBPO) a unique absorption band was observed around 400 nm as well as a broad band due to 2-BrC6H4CO2 radicals in the 500-800 nm region. The 400 nm band was also attributed to 2-BrC6H4CO2 on the basis of the similarity of both absorption in time profiles and behavior towards quenchers. T ime-resolved EPR measurements provided clear evidence for some interac tion between the CO2 radical center and the ortho-bromine atom in 2-Br C6H4CO2 and for the formation of ortho-substituted phenyl radicals, 2- XC6H4 by way of C-Br bond cleavage in excited state 2-BrBPO.