Encaging the Verkade's superbases: thermodynamic and kinetic consequences |
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Authors: | Raytchev Pascal Dimitrov Martinez Alexandre Gornitzka Heinz Dutasta Jean-Pierre |
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Institution: | Laboratoire de Chimie, E?cole Normale Supe?rieure de Lyon, CNRS, 46 Alle?e d'Italie, F-69364 Lyon, France. |
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Abstract: | Proazaphosphatranes, also known as Verkade's superbases, are nonionic species, which exhibit catalytic properties for a wide range of reactions. The properly designed host molecule 3 and its protonated counterpart 3·H](+)Cl(-) were synthesized to study how confinement can modify the stability and the reactivity of a Verkade's superbase. The results show that the encapsulation does not alter the strong basicity of the proazaphosphatrane, but dramatically decreases the rate of proton transfer. |
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