Two-Electron-Transfer Redox Systems, Part 7: Two-Step Electrochemical Oxidation of the Boron Subhalide Cluster Dianions (X = Cl, Br, I)

Autor:	Bernd Speiser, Tina Wizemann, Marc Würde
Rok vydání:	2003
Předmět:	Inorganic Chemistry Electron transfer Reaction rate constant chemistry Diffusion chemistry.chemical_element Physical chemistry Electrolyte Physical and Theoretical Chemistry Boron Electrochemistry Redox Catalysis
Zdroj:	Inorganic Chemistry. 42:4018-4028
ISSN:	1520-510X 0020-1669
DOI:	10.1021/ic034101k
Popis:	Boron subhalide cluster dianions (X = Cl, Br, I) are electrochemically oxidized in two steps. According to cyclic voltammograms, the first step is chemically reversible and yields the corresponding radical anions . The electron transfer is nearly diffusion controlled. The second, slower electron-transfer step leads to a species which we assume to be the hitherto not yet described neutral compounds . The voltammograms indicate a coupled fast catalytic reaction, producing the radical anions in a reduction by an electrolyte component. Computer simulations of the cyclic voltammograms reveal mechanistic details of the redox reactions, as well as quantitative values for formal potentials, rate constants, and diffusion coefficients. The results are compared to other BnXn redox systems.
Databáze:	OpenAIRE
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