Synthesis and X-ray structure of a new silver(I) coordination polymer assembled as one-dimensional chains

The symmetrical, bipodal ligand N′,N′,N′′′,N′′′-tetraethyl-N,N′′-pyridine-2,6-dicarbonyl-bis(thiourea) (tepytu) and silver(I) perchlorate yield a coordination polymer {[Ag2(tepytu)3](ClO4)2}n. The compound was characterized by electrospray mass spectrometry, as well as IR, 1H and 13C NMR spectroscopy. The structure of the coordination polymer has been determined by X-ray diffraction analysis. The tepytu ligands act as bidentate S,S-donors towards silver. Two silver ions and two tepytu molecules form a cyclic subunit, whereas the third tepytu of the formula unit links to the next [Ag(tepytu)2]-subunit by coordinating each of its thiocarbonyl sulfur atoms bridging towards both silver ions of one subunit. This results in an infinite one-dimensional chain leaving each silver ion coordinated in a highly distorted tetrahedral fashion.