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