87511-89-5Relevant academic research and scientific papers
The Role of Aroyloxyl Radicals in the Formation of Solvent-derived Products in Photodecomposition of Diaroyl Peroxides. The Reactivity of Substituted Cyclohexadienyl Radicals and Intermediacy of ipso Intermediates
Takahara, Shigeru,Urano, Tishiyuki,Kitamura, Akihide,Sakuragi, Hirochika,Kikuchi, Osamu,et al
, p. 688 - 697 (2007/10/02)
Photolyses of bis(2-thiophenecarbonyl)peroxide (TPO) in benzene and toluene afforded, among free-radical products, biphenyl and dimethylbiphenyls, respectively, which were solely derived from the aromatic solvents.The yields of biphenyls depended upon the rate with which the radical intermediates were generated from the peroxides in sufficiently high concentrations for their dimerization.Photolyses of TPO and dibenzoyl peroxide in 1,3,5-trimethylbenzene afforded also a solvent-derived products, 2,3',4,5',6-pentamethyldiphenylmethane.Its formation provides clear evidence for participation of cyclohexadienyl radicals bearing the aroyloxyl group on the methyl-substituted ipso carbon atom.
INTERMEDIACY OF CYCLOHEXADIENYL RADICALS WITH AN AROYLOXY GROUP ON THE METHYL-SUBSTITUTED IPSO CARBON ATOM IN PHOTOLYSES OF BIS(2-THIOPHENECARBONYL) AND DIBENZOYL PEROXIDES IN 1,3,5-TRIMETHYLBENZENE
Takahara, Shigeru,Kitamura, Akihide,Sakuragi, Hirochika,Tokumaru, Katsumi
, p. 1315 - 1318 (2007/10/02)
Investigation of the products arising from photolyses of bis(2-thiophenecarbonyl) and dibenzoyl peroxides in 1,3,5-trimethylbenzene provided clear evidence for participation of cyclohexadienyl radicals with the aroyloxy group on the methyl-substituted ipso carbon atom in formation of 2,3',4,5',6-pentamethyldiphenylmethane through recombination with 3,5-dimethylphenylmethyl radicals.
