One-Dimensional Silver(I) 5,5-Diethylbarbiturato Coordination Polymers with N-Piperidineethanol and 1,3-Bis(4) Syntheses, Crystal Structures, Spectroscopic and Thermal Properties

Abstract

Two new coordination polymers, [Ag<inf>2</inf>(barb)(pipet)]<inf>n</inf> (1) and {Na<inf>3</inf>[Ag<inf>2</inf>(barb)<inf>2</inf>](pippr)·2H<inf>2</inf>O}<inf>n</inf> (2) (where H<inf>2</inf>barb, pipet and Hpippr are 5,5-diethylbarbituric acid, N-piperidineethanol and 1,3-bis(4-piperidyl)propane, respectively) have been synthesized and characterized by elemental analysis, IR, thermal analysis and X-ray single-crystal diffraction techniques. Silver(I) ions in complexes 1 and 2 are bridged by barb dianions, leading to one-dimensional coordination polymers. In 1, the barb ligand acts as a tetradentate bridging ligand, while in 2 as a bidendate bridging ligand. The pipet ligand behaves as a bidentate chelating donor, whereas the pippr anion is not involved in coordination and remains as a counter-ion. The one-dimensional chains of 1 and 2 are further extended into supramolecular networks. Spectral and thermal analysis data for 1 and 2 are in agreement with the crystal structures. © 2009 Elsevier Ltd. All rights reserved.