Synthesis and Characterization of Copper(II) and Zinc(II) Tricyanomethanide (tcm) Complexes with Di(2-pyridyl)amine (dpyam) as Co-ligands: [Cu(dpyam)(tcm)₂], [Cu(dpyam)(tcm)(OAc)] and Zn(dpyam)₂(tcm)₂

摘要

Three new transition metal tricyanomethanide complexes [Cu(dpyam)(tcm)2] (1), [Cu(dpyam)(tcm)(OAc)] (2) and Zn(dpyam)2(tcm)2 (3) were synthesized and characterized by single crystal X-ray diffraction analysis. In 1 each copper(II) atom is coordinated to three tcm anions and one dpyam molecule to form a square pyramide geometry. In 2 the coordination geometry around the central metal is also square pyramidal, and each copper atom is surrounded by two tcm anions, one dpyam ligand and one OAc. Both 1 and 2 display a µ1,5-tcm bridged infinite chain structure. In 3 each zinc(II) atom is coordinated by two tcm anions and two dpyam molecules to form a distorted octahedral geometry. Different from the former two complexes, 3 shows a mononuclear structure. Magnetic susceptibility measurement in the range 2-300 K indicates that there are weak antiferromagnetic couplings between adjacent copper(II) ions in 1 (J=-0.03 cm-1) and 2 (J=-0.11 cm-1) respectively.