Photoreduction of 3,6-Di-tert-Butyl-o-Benzoquinones in the Presence of N,N-Dimethylanilines in Binary Solvent Mixtures


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Abstract

The effect of the composition and dielectric characteristics of binary solvent mixtures on the photoreduction rate constant (kH) of 3,6-di-tert-butyl-o-benzoquinone and its 4-cyano derivative in the presence of three N,N-dimethylanilines has been studied. It has been found that for the pair 3,6-di-tert-butyl-o-benzoquinone–N,N-dimethylaniline, the free energy electron transfer of which is ΔGe = +0.11 eV, ln kH is proportional to the difference of the reciprocals of experimentally determined optical and static permittivities for the toluene–acetonitrile and benzene–N,N-dimethylformamide blends. For quinone–amine pairs, which have ΔGe ≠ +0.11 eV, kH is maximal in toluene and benzene and decreases with the increasing amount of the polar component in the solvent mixture, with lnkH being inversely proportional to the permittivity of the medium.

About the authors

M. P. Shurygina

Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences

Author for correspondence.
Email: sch@iomc.ras.ru
Russian Federation, Nizhny Novgorod, 603950

S. A. Chesnokov

Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences

Email: sch@iomc.ras.ru
Russian Federation, Nizhny Novgorod, 603950

G. A. Abakumov

Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences

Email: sch@iomc.ras.ru
Russian Federation, Nizhny Novgorod, 603950

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