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(mu-3-NO(2)bz)(2) (bipy)](n)center dot nH(2)O, [Mn(mu-3,5-(NO2)(2)bz)(2)(bipy)](n), [Mn(mu-5-(NO2)sal)(2)(bipy)](n), and [Mn(mu-5-(NO2)sal)(2)(phen)](n), where 3-NO(2)bz(-) = 3-nitrobenzoate, 3,5-(NO2)(2)bz(-) = 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(mu-4-NO(2)bz)(4-NO(2)bz)(phen)(H2O)](n), where 4-NO(2)b(z) = 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. (C) 2014 Elsevier Ltd. All rights reserved.