Issue 75, 2022

Fusing 10-vertex closo-carborane anions with N-heterocyclic carbenes

Abstract

Discovered by Knöth in 1964, the 10-vertex closo-carborane anion [HCB9H91−] is a classical bicapped square antiprism that contains an unusual pentacoordinate carbon center. Compared to its larger icosahedral cousin [HCB11H111−], few investigations have been made into its use as a weakly coordinating anion or as a ligand substituent. Here we show that it is possible to prepare both a dianionic N-heterocyclic carbene (NHC) Li+ adduct as well as a trianionic C-2, C-5 dilithio species featuring two 10-vertex carborane anion substituents. All compounds were characterized via multinuclear NMR spectroscopy, single crystal X-ray diffraction, and HRMS when possible.

Graphical abstract: Fusing 10-vertex closo-carborane anions with N-heterocyclic carbenes

Supplementary files

Article information

Article type
Communication
Submitted
06 Maijs 2022
Accepted
15 Aug. 2022
First published
15 Aug. 2022

Chem. Commun., 2022,58, 10580-10582

Author version available

Fusing 10-vertex closo-carborane anions with N-heterocyclic carbenes

V. Tej Raviprolu, S. E. McArthur, I. Banda, A. Gregory, S. G. McArthur, S. P. Fisher and V. Lavallo, Chem. Commun., 2022, 58, 10580 DOI: 10.1039/D2CC02596E

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