1-Hydroxy-1-methylethyl radical, reactions

Like the 2-hydroxy-2,2-di-methylethyl radical, C02 can add to the reduced 2,2 -bipyridyl ligand in the ruthenium complex (reaction 33). In contrast to the electron-transfer reaction, the addition reaction is nearly diffusion controlled. Rates of many of the electron-transfer reactions of C02 are sufficiently below... 

CH3)2C 0H reacts rapidly with Ni however, the reaction occurs not by direct electron transfer but via formation of an adduct with a metal-carbon bond. These examples illustrate the utility of the 1-hydroxy-l-methylethyl radical, and its conjugate base, in studies of electron-transfer reactions in aqueous solutions. They also caution us to always evaluate the possibilities of alternate reaction pathways in our experimental design and interpretation. 

Similarly irradiation of Pd(NH3)4Q2 in aqueous uo-propanol results in the reduction of the palladium complex to colloidal palladium by both solvated electrons and 1-hydroxy-1-methylethyl radicals (CH3)2COH (formed by reaction of iyo-propanol with the initial radiolysis products H and OH). [102] Since mixtures of acetone and iso-propanol also yield (CH3)2COH under both radiolytic and photolytic conditions, they have been used in many studies on the radical chemistry of metal colloids. In many of these studies, the techniques of flash photolysis and pulse radiolysis were used to detect short lived intermediates, measure the kinetics, and determine the mechanisms of metal cation reduction, nucleation, and colloidal cluster formation. 

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