Chemistry of dicationic diboranes

• Verfasst von: Widera, Anna [VerfasserIn]
• Verfasst von: Filbeck, Erik [VerfasserIn]
• Verfasst von: Himmel, Hans-Jörg [VerfasserIn]
• Titel: Chemistry of dicationic diboranes
• Verf.angabe: Anna Widera, Erik Filbeck, and Hans-Jörg Himmel
• Jahr: 2020
• Umfang: 13 S.
• Fussnoten: First published: 02 July 2020 ; Gesehen am 02.11.2021
• Titel Quelle: Enthalten in: European journal of inorganic chemistry
• Ort Quelle: Weinheim : Wiley-VCH, 1998
• Jahr Quelle: 2020
• Band/Heft Quelle: (2020), 32, Seite 3017-3029
• ISSN Quelle: 1099-0682
• DOI: doi:10.1002/ejic.202000483
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Boron cations
• Sach-SW: Cyclophanes
• Sach-SW: Electron deficiency
• Sach-SW: Electron transfer
• Sach-SW: Lewis acids
• K10plus-PPN: 177584935X
• K10plus-PPN:
  Universitätsbibliothek
• Lokale URL UB: Zum Volltext

Abstract

Cationic monoboranes are commonly associated with elusive and highly electrophilic compounds used in modern organic synthesis. By contrast, only a few cationic diboranes are known and their chemistry comparatively underdeveloped. This review highlights some aspects of these species and their reactivity focusing primarily on especially stable guanidinate-bridged cations investigated by our group. Contrary to the intuitive presumption, sp2-hybridized cationic diboranes discussed herein serve not exclusively as Lewis acids, but also as two electron donors capable for reduction of organic π-acidic substrates. The latter proves them both as versatile synthetic reagents and valuable building blocks for the synthesis of remarkably stable macrocyclic structures with interesting electronic properties. The high tendency for formation of nonclassical multicenter bonding reflects in the dimerization behavior of cationic diborane species presented herein, leading to highly electron-deficient tetraboranes with unprecedented aromatic structures.