Mixed-Metal Coordination Polymers and Molecular Squares Based on a Ferrocene-Containing Multidentate Ligand 1,2-Di(4-Pyridylthio)ferrocene

Various metalloligands and inorganic–organic hybrid bridging ligands have been incorporated in polynuclear complexes and bimetallic coordination polymers. Ferrocene, exhibiting redox activity and facile chemical modification, is a versatile metalloligand component. However, most metal complexes with ferrocene-containing ligands form discrete low-dimensional chelate complexes or coordination polymers. Thus, we designed and synthesized ferrocene-based multidentate ligands, 1,2-di(4-pyridylthio)ferrocene (L1) and 1,2-di(2-pyridylthio)ferrocene (L2). Here we report the synthesis and structures of molecular square complexes and coordination polymers containing L1, which reacted with M(hfac)2 (hfac = 1,1,1,5,5,5-hexafluoroacetylacetonate) and AgCF3SO3 to yield molecular square complexes [M(hfac)2(L1)]2·2C6H5CH3 [M = Ni (1) and Co (2)] and [Ag(CF3SO3)(L1)(H2O)0.5]2·2CH2Cl2·H2O (3). The molecular square units comprise two metal ions bridged by two ligands. Isomorphic complexes 1 and 2 accommodate two toluene mole...