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Linear Paired Electrolysis—Realising 200 % Current Efficiency for Stoichiometric Transformations—The Electrochemical Bromination of Alkenes
Author(s) -
Strehl Julia,
Abraham Marvin L.,
Hilt Gerhard
Publication year - 2021
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202016413
Subject(s) - halogenation , bromine , electrolysis , cyclohexene , chemistry , electrochemistry , anode , cathode , oxidizing agent , inorganic chemistry , hydrogen peroxide , bromide , stoichiometry , electrophile , photochemistry , current (fluid) , organic chemistry , electrode , catalysis , electrolyte , electrical engineering , engineering
The generation of bromine by oxidation of bromide anions at the anode and reduction of molecular oxygen at the cathode to hydrogen peroxide resulted in the overall formation of two molecules of Br 2 (=four electron oxidation) by passing just two electrons through the solution. The bromine was used for the bromination of alkenes and thereby a linear paired electrolysis was attained which resulted in current efficencies of up to 200 %. Also, the diiodination of cyclohexene as well as the electrophilic aromatic bromination of an electron‐rich arene were realised both in 168 % current efficiencies.