Syntheses, Structures, and Magnetic Properties of Two Kinds of Unique Heterometallic Chains with Mixed-Bridging Ligands of Tricyanometalate and Alkoxide

The reactions of copper(II) salts, 1,3-bis(dimethylamino)-2-propanol (bdmapH) or 1,3-bis(amino)-2-propanol (bapH) and [(Tp)Fe(CN)3]− (Tp = tris(pyrazolyl)hydroborate) gave four mixed-bridged heterometallic one-dimensional (1D) coordination polymers, {[(Tp)2Fe2(CN)6(OAc)(bdmap)Cu2(H2O)]·2H2O}n (1, HOAc = acetic acid), {[(Tp)2Fe2(CN)6(Pa)(bdmap)Cu2(H2O)]·2MeCN}n (2, HPa = propionic acid), {[(Tp)2Fe2(CN)6(Tfa)(bdmap)Cu2(H2O)]·2MeCN}n (3, HTfa = trifluoroacetic acid), and {[(Tp)2Fe2(CN)6(OAc)(bap)Cu2(MeOH)]·2MeOH·H2O}n (4). Complexes 1−3 show unique branched zigzag chain structures and complex 4 exhibits as a steplike chain. Ferromagnetic interactions between FeIII and CuII ions by bridging cyanides are observed in all complexes. Strong antiferromagnetic interactions are presented between the CuII ions in complexes 1−3, whereas similar antiferromagnetic coupling between CuII ions is obviously weakened in complex 4 because of the distortion of penta-coordinated CuII ions.