Synthesis and Characterization of Two Trinuclear Nickel(II) Complexes

Abstract

AbstractTwo novel trinuclear nickel(II) complexes have been synthesized and characterized by X‐ray single crystal diffraction. Compound [Ni3(ashz)3(py)2(DMF)2]·(DMF)2 (1) crystallizes in the monoclinic, space group C2/c, with a = 22.114(2), b = 10.509(9), c = 19.485(2) Å, β = 114.443(1)°, Z = 4; compound [Ni3(acshz)3(py)2(DMF)2]·(DMF)2 (2) crystallizes in the monoclinic space group P21/n with a = 20.0620(2), b = 9.7017(6), c = 25.0533(2) Å, β = 97.0610(2)°, Z = 4, where ashz and acshz are deprotonated N‐acetylsalicylhydrazide (H3ashz) and N‐acetyl‐5‐chlorosalicylhydrazide (H3acshz), respectively. The crystal structure analysis of 1 and 2 showed that three Ni2+ ions in a linear arrangement are bridged by two ligands ((ashz)3− or (acshz)3−) to form a neutral nuclear with two four‐coordinate square‐planar nickel ions linked by a six‐coordinate octahedral central nickel ion.