Treatment of carborane anions with excess RBr (R = Me, Et) in a sealed Pyrex tube at 200 °C gives peralkylated carborane anions in quantitative yields, which represents the most convenient and the most economic method so far reported in the literature for the preparation of peralkylcarborane anions.
A novel synthetic route to peralkylated carborane anions, 1-H-CB9Me9− and 1-H-CB11R11− (R = Me, Et)
C. Tsang and Z. Xie, Chem. Commun., 2000, 1839 DOI: 10.1039/B004737F
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