89192-73-4Relevant academic research and scientific papers
Thermal and Photochemical Decomposition of 9-Arylxanthen-9-yl Hydroperoxides and Peroxides
Goosen, Andre,McCleland, Cedric W.,Taljaard, Benjamin
, p. 995 - 1000 (2007/10/02)
The thermolysis and photolysis of a series of 9-arylxanthenyl hydroperoxides and peroxides have been investigated by means of differential scanning calorimetry, electron paramagnetic spectroscopy and product studies.These relatively stable peroxidic compounds were found to rearrange smoothly on being heated at temperatures > 120 deg C and on photolysis, respectively, through concerted reaction pathways.Photolysis of 9-hydroperoxy-9-phenylxanthene and di(9-phenylxanthen-9-yl)peroxide, respectively, have been shown by EPR spectroscopy to generate 9-phenylxanthenyl radicals which dimerise at low temperatures and reform the free radicals at ambient temperature.
The Mechanism of Benzophenone-sensitised Oxidation of 9-Phenilxanthene with Oxygen
Glover, Stephen A.,Goosen, Andre,McCleland, Cedric W.,Taljaard, Benjamin,Vogel, F. Ruric
, p. 1205 - 1210 (2007/10/02)
From an investigation of the effect of inhibitors, quenchers, and the failure of a singlet sensitiser to effect the oxidation, it is proposed that the benzophenone-sensitised oxidation of 9-phenylxanthene with oxygen is a type I process.Further support for this conclusion is afforded by spectroscopic considerations.Evidence is also presented that the oxidation is a non-chain process, and the effect of acid on the product distribution is discussed.
