title: endo-Cavity complexation and through-the-annulus threading of large calixarenes induced by very loose alkylammonium ion pairs.
abstract: A general mode to obtain endo-complexation and through-the-annulus threading of scarcely efficient macrocyclic hosts was obtained by exploiting the inducing effect of the weakly coordinating tetrakis[3,5-bis(trifluoromethyl)phenyl]borate (TFPB) anion that gives free "naked" cations. This method works very well with simple, conformationally mobile calix[6-7]arene ethers, which give conformationally blocked endo-calix or [2]pseudorotaxane complexes.
authors.affiliation: Dipartimento di Chimica, Università di Salerno, Via Ponte don Melillo, I-84084 Fisciano, Salerno, Italy. cgaeta@unisa.it
authors.forename: Carmine
authors.initials: C
authors.lastname: Gaeta
authors.forename: Francesco
authors.initials: F
authors.lastname: Troisi
authors.forename: Placido
authors.initials: P
authors.lastname: Neri