Cucurbit[7]uril stabilization of a diarylmethane carbocation in aqueous solution |
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| Authors: | Ruibing Wang |
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| Institution: | Department of Chemistry, Queen’s University, 90 Bader Lane, Kingston, ON, Canada K7L 3N6 |
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| Abstract: | The stability of the 4,4′-bis(dimethylamino)diphenylmethane carbocation is significantly enhanced in aqueous solution by its inclusion in the cucurbit7]uril host cavity. The formation of the host-guest complex (KCB7] = 2.0 × 104 M−1) shifts the carbinol-carbocation equilibrium, maximizing the formation of the intensely blue carbocation to 90% at pH 5.2. |
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