Syntheses, structures and properties of two one-dimensional chain complexes: [Mn(Hpdc)(H 2O) 2] n and [Cu 2(Hpdc) 2][4,4 ′-dpdo] (Hpdc=3,5-pyrazoledicarboxylic acid group, dpdo=4,4 ′-dipyridyl- N, N′-dioxide hydrate)

Abstract

Two one-dimensional chain complexes: [Mn(Hpdc)(H 2O) 2] n ( 1) and [Cu 2(Hpdc) 2][4,4 ′-dpdo] ( 2) have been synthesized from hydrothermal solutions at 150 °C. Both structures are mainly constructed by a single multifunctional ligand, monopotassium 3,5-pyrazoledicarboxylate (KH 2pdc). All metal atoms are six-coordinated in 1, two kinds of carboxylic bridges are found between manganese atoms to form a one-dimensional chain and further construct three-dimensional structure by hydrogen bonds. In 2, all copper atoms are five-coordinated, Cu1 and Cu1A are linked by the nitrogen atoms in the pyrazole ring to form a dimmer and two-dimensional structure is formed by weak coordination bonds and hydrogen bonds. Susceptibility data of 1 and 2 show antiferromagnetic coupling interactions.