Bimacrocyclic Effect in Anion Recognition by a Copper(II) Bicyclam Complex.

ABSTRACT: The dicopper(II) complex of the bimacrocyclic ligand α,α'-bis(5,7-dimethyl-1,4,8,11-tetraazacyclotetradecan-6-yl)-o-xylene, 2, interacts with selected anions in dimethyl sulfoxide solution according to two different modes: (i) halides (Cl^-, Br^-, and I^-) and N₃ ^- coordinate the two metal centers at the same time between the two macrocyclic subunits that face each other and (ii) anionic species that do not fit the bridging coordination mode (e.g., NCO^-, SCN^-, CH₃COO^-, NO₃ ^-, and H₂PO₄ ^-) interact with copper(II) ions only at the "external" positions or their interaction is too weak to be detected. Occurrence of the bridging in

SUBMITTER: Invernici M 

PROVIDER: S-EPMC6644100 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature