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Electron-rich, Lewis acidic diborane meets N-heterocyclic aromatics: formation and electron transfer in cyclophane boranes

Herein reported are the reactions of an electron-rich, Lewis acidic diborane with N-heterocyclic aromatics to give first members of an unprecedented family of highly charged cationic cyclophanes with diboranyl units. Tetracationic cyclophanes with 4,4‘-bipyridine/ 1,2-bis(4-pyridyl)ethylene and dibo...

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Main Authors: Widera, Anna (Author) , Filbeck, Erik (Author) , Wadepohl, Hubert (Author) , Kaifer, Elisabeth (Author) , Himmel, Hans-Jörg (Author)
Format: Article (Journal)
Language:English
Published: 2020
In: Chemistry - a European journal
Year: 2020, Volume: 26, Issue: 15, Pages: 3435-3440
ISSN:1521-3765
DOI:10.1002/chem.202000189
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1002/chem.202000189
Verlag, kostenfrei, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/chem.202000189
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Author Notes:Anna Widera, Erik Filbeck, Hubert Wadepohl, Elisabeth Kaifer, and Hans-Jörg Himmel
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Summary:Herein reported are the reactions of an electron-rich, Lewis acidic diborane with N-heterocyclic aromatics to give first members of an unprecedented family of highly charged cationic cyclophanes with diboranyl units. Tetracationic cyclophanes with 4,4‘-bipyridine/ 1,2-bis(4-pyridyl)ethylene and diboranyl units were synthesized and their redox chemistry was studied. Cyclisation of two diboranyl and two pyrazine units is accompanied by electron transfer from the diboranyl unit to the pyrazine. Our results pave the way for the integration of redox-active diboranyl units into cyclophanes and supramolecular structures.
Item Description:Version of record online: February 27, 2020
Gesehen am 25.11.2021
Physical Description:Online Resource
ISSN:1521-3765
DOI:10.1002/chem.202000189

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