Three novel trinuclear zinc(II)ickel(II) complexes with pentadentate ligands N-nitrobenzoylsalicylhydrazidate

摘要

Three trinuclear zinc(II)ickel(II) complexes with two pentadentate ligands, N-p-nitrobenzoylsalicylhydrazidate (H-3-p-nbzshz) and N-o-nitrobenzoylsalicylhydrazidate (H-3-o-nbzshz) have been synthesized and characterized by X-ray crystallography. The complex [Zn-3(p-nbzshz)(2)(C5H5N)(4)](n) (1) molecule exhibits a one-dimensional wave-like chain structure resulting from the linkage of phenolate oxygen donor atoms of the ligands between neighboring motifs. The two nickel(II) complexes, Ni-3(p-nbzshz)(2)(C5H5N)(4) (2) and Ni-3(o-nbzshz)(2)(C3H7NO)(2)(C2H6O)(2) (3) are trinuclear complexes in which three nickel(II) centers exhibit alternating square-planar and octahedral geometries. Complex 2 exhibits a curved Ni-3 metal arrangement with a Ni(1)-Ni(2)-Ni(3) angle of 62.36 degrees, while the three nickel atoms in complex 3 are strictly linear with an angle of 180 degrees. (C) 2007 Elsevier Ltd. All rights reserved.