Synthesis, Structure, and Cyclic Voltammetric Property of Metal String Complex [Ni3(dpa)4(ClO4)(Cl)]•CH2Cl2

The metal string complex [Ni-3(dpa)(4)(ClO4)(Cl)] CH2Cl2 (1) [dpa = bis(2 pyridyl)amine] with different axial ligands was synthesized and characterized by elemental analysis, IR, UV/Vis, and fluorescence spectroscopy and TG analysis The molecular structure was determined by single crystal X ray analysis and its electrochemical properties were investigated This metal string complex is the first example with different axial ligands and in its structure a different structural packing relative to the metal string complex [Ni-3(dpa)(4)(Cl)(2)] (2) with two axial chloride ligands is generated The intense C-H pi interactions observed for 1 provide additional stability The axial mono substitution of Cl- by ClO4- in 1 relative to 2 results in one obviously short Ni-Ni distance and a higher stability towards oxidation