PBN-OH adduct formed in a Fenton system

The toluene extracts of the Fenton mixture (cf. Fig. 8) were bubbled with dry nitrogen until dryness. To the dried white residue was added 0.5 ml of either chloroform, methanol, benzene, chloroform methanol (2 1) or ethanol. The 

Re-extraction of these solutions with toluene gave the initial ESR spectrum of PBN/ OH in toluene (Fig. 8), indicating that this adduct has not undergone decomposition during the extraction process (data not shown). 

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