Interesting Copper(I) and Mercury(II) 1D Coordination Polymers Based on 3,6-Bis(2-pyridylthio)pyridazine Ligand: Syntheses, Structures and Properties

Abstract

Two interesting d10 metal complexes of 3,6-bis(2-pyridylthio)pyridazine ligand (PTP), [Cu3I3(PTP)] n (1) and [HgI2(PTP)] n (2), have been synthesized and characterized by IR, elemental analysis, UV–Vis–NIR spectra, thermal analysis and single crystal X-ray diffraction analysis. Single-crystal X-ray analyses show that two complexes are both 1D chain coordination polymer. Complex 1 is a linear chain structure which is constructed from trinuclear Cu3I3 butterfly-shaped units by means of Cu–I bonds. Complex 2 is one-dimensional helical chain structure. In complex 2, two helical single chains form a double helix structure, and these double helix structures are further assembled to form a quasi 2D network by C–H⋯I hydrogen bonds. Optical diffuse-reflection spectra results suggest complex 1 has the property of the semiconductor.