hrvatski

Reakcije organskih peroksilnih radikala: kinetika i mehanizmi

Organic peroxyl radicals react with iodide via formation of ROOI radical anion as a primary intermediate. Further reaction with another iodide ion liberates the iodine molecule and the alkoxyl radical. The latter oxidizes another iodide ion into an iodine atom which in the end gives the oxidation of three iodide ions per one peroxyl radical. The reaction rate constants of halogenated alkylperoxyl radicals as a function of pH, the solvent polarity, and the substituent electronegativity, as well as the primary yields of the reaction products, were determined by using the pulse radiolysis method. The obtained high yields of I3- as the final product were determined by using the -radiolysis method. The obtained high yields of I3- in the reaction of some nonhalogenated peroxyl radicals (with the participation of protons in the reaction) suggested the occurance of a multi-electron transfer mechanism in these systems as well.

peroksilni radikali; pulsna radioliza; mehanizam reakcije; konstanta brzine reakcije

nije evidentirano