Collect. Czech. Chem. Commun. 2002, 67, 1025-1034

C-Halogenation of the closo-[CB11H12]- Anion

Zbyněk Janoušek, Cameron L. Hilton, Peter J. Schreiber and Josef Michl*

Department of Chemistry and Biochemistry, University of Colorado at Boulder, Boulder, CO 80309-0215, U.S.A.


A synthesis is described of the four C-halogenated 1-X-CB11H11- anions (X = I, Br, Cl, F) using N-halosuccinimides and N-fluorobis(benzenesulfonyl)amine as halogenating agents. The procedure yields only the desired product next to unreacted starting material. Regularities in the 11B and 13C NMR chemical shifts of singly halogenated icosahedral carboranes are summarized.

Keywords: Boranes; Boron clusters; Carboranes; Halogenation; Monocarbaboranes; 11B NMR and 13C NMR spectroscopy.

References: 27 live references.