Synthesis and characterization of nickel(II) and copper(II) tricyanomethanide complexes with tris(2-aminoethyl)amine as co-ligand

Abstract

Two new transition metal tricyanomethanide (tcm) complexes with tris(2-aminoethyl)amine (tren) as co-ligand, [Ni(tren)(tcm)2] (1) and [Cu(tren)]3·(μ3-tren)·NO3·5tcm·2H2O (2), were synthesized and characterized by FT-IR spectrum, Thermogravimetry (TG) and single crystal X-ray diffraction analysis. In 1 each nickel(II) atom is coordinated to two tcm anions and one tren molecule to form a mononuclear complex with distorted octahedral geometry. In 2 three copper(II) atoms, each being chelated by a tetradentate tren ligand, are bridged by a μ3-tren ligand to form a cationic trinuclear copper unit. Magnetic susceptibility measurement in the range 2–300K indicates that there are weak ferromagnetic interactions in 1 (θ=1.17K, C=1.17cm3mol−1K, D=3.5cm−1, g=2.17, zJ′=0.44cm−1) and 2 (θ=0.52K, C=1.35cm3mol−1K) respectively.