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

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-NO2bz)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-NO2bz− = 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-NO2bz)(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.

Graphical abstractFive polymeric Mn(II) complexes with bridging carboxylato groups were prepared and structurally characterized. The magnetic susceptibility and magnetization data confirm that weak exchange interactions of an antiferromagnetic nature apply in these complexes.Figure optionsDownload full-size imageDownload as PowerPoint slide