Synthesis and characterization of redox-active coordination polymers generated from ferrocene-containing bridging ligands

Coordination polymers showing redox activity have been constructed by using ferrocene-based bidentate ligands, 1,1'-(4-dipyridinethio)ferrocene (1) and 1,1'-(2-dipyridinethio)ferrocene (2). The ligand of 1 formed an Ag-1 coordination polymer, 1.AgPF6.(CH3CN)(2) (3). This complex showed a 1-D double-chain structure, with a weak interchain Ag...Ag interaction. Combination of 1 with M(hfaC)(2) (M = Mn, Cu, Zn) afforded 1-D chain complexes, 1.M(hfaC)(2) (M = Mn (5), Cu (6), Zn (7)). The complex 2.CuPF6 (8) showed a 1-D twisted helix-like chain structure.