Synthesis and Characterization of Two Trinuclear Nickel(II) Complexes

Two novel trinuclear nickel(II) complexes have been synthesized and characterized by X‐ray single crystal diffraction. Compound [Ni 3 (ashz) 3 (py) 2 (DMF) 2 ]·(DMF) 2 ( 1 ) crystallizes in the monoclinic, space group C 2/ c , with a = 22.114(2), b = 10.509(9), c = 19.485(2) Å, β = 114.443(1)°, Z = 4; compound [Ni 3 (acshz) 3 (py) 2 (DMF) 2 ]·(DMF) 2 ( 2 ) crystallizes in the monoclinic space group P 2 1 / 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 (H 3 ashz) and N‐acetyl‐5‐chlorosalicylhydrazide (H 3 acshz), respectively. The crystal structure analysis of 1 and 2 showed that three Ni 2+ 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.