Boozer-Hammond mechanism

In recent publications, Gugumus (6) and Felder et al (13,14) have proposed a modification of the Boozer-Hammond mechanism (15) to explain their observed kinetics in the inhibition of ketone photo-oxidations by hindered amine species (reaction 10). Peroxyl radicals were suggested to form charge transfer complexes with the... 

In addition the Boozer-Hammond mechanism has been shown to be invalid for aromatic amines (l6), so that reaction 10 obviously requires further substantiation. 

The reaction of free radicals with aromatic amines and phenols may proceed by two routes, abstraction of H from the O—H or N—H bond and addition of the radical to an inhibitor. Free radicals and atoms, H-, HO, CH3 and C6H5, are known to add to aromatic compounds. Both abstraction and addition are observed simultaneously in alcohol oxidation (the Boozer and Hammond mechanism [74]), while hydrocarbon peroxy radicals only abstract H-atoms from inhibitors. ... 

Another description of a common mechanism for radical reactions of phenols and aromatic amines was given by Boozer and Hammond (1954). They suggested the reversible formation of a loose molecular complex in the first step of the reaction between a peroxy radical and phenol, i.e.,... 

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See also in sourсe #XX -- [ ]

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