Cover Feature: Halogen Complexes of Anionic N‐Heterocyclic Carbenes (Chem. Eur. J. 13/2021). Issue 13 (7th January 2021)

• Record Type: Journal Article
• Authors: Frosch, Jenni; Koneczny, Marvin; Bannenberg, Thomas; Tamm, Matthias
• Is Part Of: Chemistry. Volume 27:Issue 13(2021)
• Page Start: 4214
• Page End: 4214
• Publication Date: 2021-01-07
• Subjects: halogen bonding -- hypervalency -- iodine -- London dispersion -- N-heterocyclic carbenes; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.202005273
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract : Iodine complexes of anionic N‐heterocyclic carbenes (NHC) act as electrophiles towards a variety of nucleophiles, with the interactions ranging from noncovalent charge‐transfer or halogen bonding to covalent 3‐center, 4‐electron bonding. Hypervalent (10‐X‐2) bis(carbene)iodine(I) and ‐bromine(I) complexes could be isolated and structurally characterized, and computational studies reveal that London dispersion involving the bulky NHC ligands (R=Dipp, Mes) contributes significantly to the stability of these systems. More information can be found in the Full Paper by M. Tamm et al. on page 4349 .