Chelating, bridging, and chain structures within Ag(I) and Cu(I) complexes of bis(nicotinyloxy), bis(isonicotinyloxy), and bis(pyrimidine-5-carboxyloxy)-1,8-disubstituted anthraquinone ligands

Abstract

Reaction of Ag(I) and Cu(I) [M(NCCH 3) 4]X (X = BF 4 − and PF 6 −) salts with 1,8- bis(nicotinyloxy)anthracene-9,10-dione ( 1), 1,8- bis(isonicotinyloxy)anthracene-9,10-dione ( 2), and 1,8- bis(pyrimidine-5-carboxyloxy)anthracene-9,10-dione ( 3), yield new chelating and bridging complexes and two new coordination polymers. The bridging capabilities of ligands 1 and 2 have not been demonstrated before, and ligand 1, by itself, has the flexibility to produce either chelated or bridged structures and an unusual ladder coordination polymer. The tetradentate ligand 3 also produces a one-dimensional coordination polymer in the presence of one equivalent of Ag(I). All complexes have been characterized by X-ray crystallography.