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Energies and selectivities for anion binding as a function of host conformational preorganisation
Reinhard W Hoffmann1, Frank Hettche, Klaus Harms
1Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse, D-35032 Marburg, Germany. rwho@chemie.uni-marburg.de
Chemical Communications (Cambridge, England)
|July 18, 2002
Abstract:
The anion binding of tripodal hosts 2-4 has been studied. Increasing levels of conformational preorganisation of the side arms of the hosts led to increased (Cl-) unaltered (Br-) or decreased (NO3-) binding; it was thus possible to change guest selectivities by about an order of magnitude through conformational preorganisation of the flexible host.