Affiliation:
1. Department of Chemistry, University of California, Riverside, CA 92521–0403, USA.
Abstract
A new superacid, H(CB
11
H
6
X
6
) (where X = chlorine or bromine), whose conjugate base is the exceptionally inert CB
11
H
6
X
6
–
carborane anion, separates Brønsted acidity from oxidizing capacity and anion nucleophilicity in a manner not previously achieved. Reaction of this superacid with C
60
gives HC
60
+
as a stable ion in solution and in the solid state. In a separate experiment, an oxidant was developed such that the long-sought C
60
·+
ion can be synthesized in solution. The preparation of these two fullerene carbocations is a notable departure from the prevalent chemistry of C
60
, which is dominated by the formation of anions or the addition of nucleophiles. The H(CB
11
H
6
X
6
) superacid overcomes the major limitations of presently known superacids and has potentially wide application.
Publisher
American Association for the Advancement of Science (AAAS)
Reference28 articles.
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Cited by
255 articles.
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