Surprises in the energetics of host-guest anion binding to calix[4]pyrrole.
Contrary to common expectation, calorimetric measurements do not corroborate the preference of calix[4]pyrrole for fluoride over chloride in acetonitrile solution.
Schmidtchen
Franz P
FP
Institut für Organische Chemie und Biochemie, Technische Universität München, D-85747 Garching, Germany. schmidtchen@ch.tum.de