Structural analysis of bis{(N,N′–dimethylformamide) (μ‐formato)[μ‐bis(salicylidene)–1,3‐propanediaminato] nickel(II)} copper(II) and zinc(II) monohydrate hetero‐trinuclear complexes

The two linear hetero‐trinuclear metallic complexes with Cu²⁺, Ni²⁺ and Zn²⁺ ions, CuNi₂ {(CHO₂)(SALPD)(CH₃)₂NCHO]}₂],(I) and ZnNi₂{(CHO₂)(SALPD)(CH₃)₂NCHO]}₂],(II), form crystals which belong to the monoclinic system, space group P2₁/c, with unit cell dimensions a=10.537(4), b=16.612(5), c=13.837(3) Å, β=111.09(5)°, V=2259.8(12) ų in (I) and a=10.525(4), b=16.658(5), c=13.826(3) Å, β=111.11(5) °, V=2261.4(8) ų in (II), respectively. The coordinations around the M (Ni²⁺, Cu²⁺, Zn²⁺) ions in the title complexes are distorted octahedrals. The stereochemistries of the bridge ligands, linking to the metal ions each other, are changed between Ni…M (Cu²⁺, Zn²⁺) distances. The Ni…M (Cu²⁺, Zn²⁺) distances are 3.0469(13) and 3.0645(14), respectively. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)