Collect. Czech. Chem. Commun. 1994, 59, 1809-1814

The Crystal and Molecular Structure of a Zinc(II) Complex with a New Non-Symmetrical Tetradentate Schiff Base, [Zn(C15H18N3O)Br]

Jan Ondráčeka, Bohumil Kratochvíla and Václav Haberb

a Department of Solid State Chemistry, Prague Institute of Chemical Technology, 166 28 Prague 6, Czech Republic
b Department of Inorganic Chemistry, Charles University, 128 40 Prague 2, Czech Republic


The structure of (1-(2-(2-aminoethylamino)ethylimino)methyl-2-napththolato-O,N,N',N")bromozinc(II), [Zn(naden)Br], containing a new Schiff base ligand, naden, was solved by Patterson and Fourier techniques and refined anisotropically to R = 0.047 for 1 426 unique observed reflections. The complex crystallizes in the space group Pbca with lattice parameters a = 14.024(1), b = 10.699(1), c = 21.635(2) Å, Z = 8. The structure of [Zn(C15H18N3O)Br] complex molecule consists of two six-membered aromatic rings and one six-membered and two five-membered chelate rings. The distorted coordinate polyhedron around Zn atom is formed by N1, N2, N3 and O atoms of the naden ligand and Br anion. Unusually short C-C bond in five-membered rings as well as small N-C-C-N torsion angles and somewhat large C4-C3-N2 and N2-C2-C1 angles are probably connected with intense thermal vibrations of C2 and C3 atoms. The structure is hold together by weak hydrogen bonds.