title: New hybrid [2]catenanes based on a 4,4'-bipyridinium ligand.
abstract: The self-assembly-mediated synthesis of metallomacrocycles 4a and 4b from (en)M(NO3)2 (M = Pd, Pt) and bipyridinium ligand 3 is described. The reaction is templated by disodium p-phenyldiacetic dicarboxylate, which is inserted into the macrocyclic cavity. Similarly, the self-assembly process between ligand 3, (en)M(NO3)2 (M = Pd, Pt), and the macrocyclic polyether 6 resulted in the formation of hybrid catenanes 7a and 7b. In the [2]catenanes, the circumrotation of the macrocyclic polyether through the cavity of the metallocycle is slow on the 1H NMR time scale.
authors.affiliation: Departamento de Química Fundamental, Facultad de Ciencias, Universidade da Coruña, Campus A Zapateira, 15071 La Coruña, Spain.
authors.forename: Marcos
authors.initials: M
authors.lastname: Chas
authors.forename: Elena
authors.initials: E
authors.lastname: Pia
authors.forename: Rosa
authors.initials: R
authors.lastname: Toba
authors.forename: Carlos
authors.initials: C
authors.lastname: Peinador
authors.forename: José M
authors.initials: JM
authors.lastname: Quintela