Inside Back Cover: Crystalline Anions Based on Classical N‐Heterocyclic Carbenes (Angew. Chem. Int. Ed. 5/2023). Issue 5 (16th January 2023)

• Record Type: Journal Article
• Authors: Merschel, Arne; Rottschäfer, Dennis; Neumann, Beate; Stammler, Hans‐Georg; Ringenberg, Mark; van Gastel, Maurice; Demirer, T. Ilgin; Andrada, Diego M.; Ghadwal, Rajendra S.
• Is Part Of: Angewandte Chemie international edition. Volume 62:Issue 5(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2023-01-16
• Subjects: Carbanions -- Carbenes -- Multiple Redox-States -- N-Heterocycle -- Radicals; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.202217967
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract : Stable anions based on classical N‐heterocyclic carbenes (NHCs) can be prepared by KC8 reduction of the corresponding NHC radicals as reported by Diego M. Andrada, Rajendra S. Ghadwal, and co‐workers in their Research Article (e202215244) . The key to the stability of these anions is the delocalization of the electron lone pair over the C2‐biphenyl substituent. In the solid state, the anions form a hexameric tubular structure with biphenyl substituents pointing inwards, as a result of intriguing cation–π interactions. The spider weaves its web.