Manganese(II) one-dimensional coordination polymers with nitrobenzoato or nitrosalicylato bridges: Syntheses, crystal structures, and magnetic properties

Abstract

Five polymeric Mn(II) complexes with bridging carboxylato groups were prepared and structurally characterized. The bridging carboxylato ligand in double-chain coordination polymeric structures of [Mn(μ-3-NO 2bz)2(bipy)]n·nH2O, [Mn(μ-3,5-(NO2)2bz)2(bipy)]n, [Mn(μ-5-(NO2)sal)2(bipy)]n, and [Mn(μ-5-(NO2)sal)2(phen)]n, where 3-NO 2bz- = 3-nitrobenzoate, 3,5-(NO2) 2bz- = 3,5-dinitrobenzoate, 5-(NO2)sal - = 5-nitrosalicylate, bipy = 2,2′-bipyridine and phen = 1,10-phenanthroline, exhibits the syn-anti bidentate bridging mode. The Mn(II) atom in the coordination polymer [Mn(μ-4-NO2bz)(4-NO 2bz)(phen)(H2O)]n, where 4-NO2bz = 3-nitrobenzoate, is coordinated by terminal carboxylato groups in the syn monodentate mode but two Mn(II) atoms are connected with bridging 4-nitrobenzoate ligands in the anti-anti bidentate bridging mode. The magnetic susceptibility and magnetization data confirm that weak exchange interactions of an antiferromagnetic nature apply in these complexes. © 2014 Elsevier Ltd. All rights reserved.