Abstract
The rate constant for the reaction R{sup {sm bullet}} + O{sub 2} {yields} ROO{sup {sm bullet}} in aqueous solution was determined for 18 alkyl radicals by laser flash photolysis. The values are all at the diffusion-controlled limit and lie in the range (1.6-4.9) {times} 10{sup 9} L mol{sup {minus}1} s{sup {minus}1}. The radicals studied are primary, substituted primary, secondary, and benzyl radicals.
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