Experimental study of a diffusion-controlled reaction involving a chain molecule with terminal reactive sites

Abstract

Diffusion-controlled reaction of electron transfer from diphenylsilane radical anions to the series of a-and a,x-bromoalkanes with alkane chain length up to 18 atoms has been studied in n-dodecane solutions. At room temperature, reaction rate constants have been determined and corresponding reaction radii have been evaluated. It has been shown that a not-too-long chain molecule, which contains two terminal reaction sites and participates in the diffusion-controlled reaction, may be considered as a rapidly rotating pair of reacting sinks with a distance between their centers equal to the mean-square end-to-end distance of the molecule.