Electrooxidation of Hypercoordinated Derivatives of Silicon and Reactivity of Their Electrogenerated Cation Radicals: 1-Substituted Silatranes

Author:

Romanovs Vitalijs1,Belogolova Elena F.2,Doronina Evgeniya P.2ORCID,Sidorkin Valery F.2ORCID,Jouikov Viatcheslav V.3

Affiliation:

1. Latvian Institute of Organic Synthesis, Aizkraukles 21, LV-1006 Riga, Latvia

2. A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky Str., 664033 Irkutsk, Russia

3. UMR 6226—Institute of Chemical Sciences of Rennes, University of Rennes, 35042 Rennes, France

Abstract

Electrochemical oxidation of 1-R-substituted silatranes 1 (R = Me, vinyl, (CH2)2CN, CH2Ph, CH2(C10H7), Ph, C6H4Me, p-Cl-C6H4, Cl)—classical representatives of pentacoordinated silicon compounds—and the formation of their short living cation radicals upon reversible or quasi-reversible one-electron withdrawal were studied by means of cyclic and square-wave voltammetry, faradaic impedance spectroscopy and real-time temperature-dependent EPR spectroelectrochemistry supported by DFT B3PW91/6-311++G(d,p) (C-PCM, acetonitrile) calculations. The main reaction responsible for the decay of 1+• is shown to be their deprotonation, and ways of increasing the stability of these species are proposed.

Funder

European Regional Development Fund ERDF–Latvia

Publisher

MDPI AG

Subject

Chemistry (miscellaneous),Analytical Chemistry,Organic Chemistry,Physical and Theoretical Chemistry,Molecular Medicine,Drug Discovery,Pharmaceutical Science

Reference74 articles.

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3. Silatranes;Voronkov;J. Organomet. Chem.,1982

4. Pombeiro, A.J.L., and McCleverty, J.A. (1993). Molecular Electrochemistry of Inorganic, Bioinorganic and Organometallic Compounds, Springer.

5. Anodic oxidation of silatrane and its Si-substituted derivatives in acetonitrile at a graphite electrode;Broka;J. Obsch. Khim.,1991

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