Journal of the American Chemical Society p. 7069 - 7073 (1982)
Update date:2022-08-11
Topics:
Eberhardt, Manfred K.
Martinez, Gines A.
Rivera, Juana I.
Fuentes-Aponte, Anselmo
The thermal decomposition of Na2S2O8 in aqueous solutions of benzene and nitrobenzene at 80 deg C, 40 deg C, and room temperature gives phenol, biphenyl, and o- and p-nitrophenol.In the absence of benzene no nitrophenols were formed under otherwise identical conditions.We have previously suggested a dissociation of the intermediate hydroxycyclohexadienyl radicals to OH radical and benzene.On the basis of kinetics of the reactions involved and the Ea and A values for the dissociation of the hydroxycyclohexadienyl radicals, we have estimated that under our reaction conditions even at room temperature a considerable fraction of hydroxycyclohexadienyl radicals dissociates to OH radicals and benzene.In addition to nitrobenzene we have used benzonitrile as a scavenger for OH radicals.The results of competition experiments between benzene, nitrobenzene, and benzonitrile are consistent with the formation of free OH radicals.
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