Synthesis and characterization of nickel(II) complexes with three potentially hexadentate Schiff-base ligands and polyamines: X-ray crystal structure determination of one nickel(II) complex

{2-[2-(Isopropyl-amino)-ethyl-imino-meth-yl]-5-meth-oxy-phenolato}(thio-cyanato--κN)nickel(II)

In the title mononuclear complex, [Ni(C₁₃H₁₉N₂O₂)(NCS)], the Ni^II ion is coordinated by one phenolate O atom, one imine N atom, and one amine N atom of a 2-[2-(isopropyl­amino)­ethyl­imino­meth­yl]-5-meth­oxy­phenolate Schiff base ligand, and by one N atom of a thio­cyanate ligand, forming a slightly distorted square-planar geometry.

Bis{1-[3-(diethyl-ammonio)-propyl-imino-meth-yl]naphthalen-2-olato}nickel(II) dinitrate

The asymmetric unit of the title compound, [Ni(C(18)H(24)N(2)O)(2)](NO(3))(2), consists of one half of the centrosymmetric nickel(II) complex cation and a nitrate anion. The Ni(II) atom, lying on an inversion center, is four-coordinated by the phenolate O atoms and imine N atoms of two Schiff base ligands, forming a square-planar geometry. The O- and N-donor atoms are mutually trans. In the crystal structure, the nitrate anions are linked to the complex cations by inter-molecular N-H⋯O hydrogen bonds.

Bis[2-(cyclopentyliminomethyl)-5-methoxyphenolato]copper(II)

The title compound, [Cu(C₁₃H₁₆NO₂)₂], is a mononuclear copper(II) complex derived from the Schiff base ligand 2-(cyclo­pentyl­imino­meth­yl)-5-meth­oxy­phenol and copper acetate. The Cu^II atom is four-coordinated by the phenolate O atoms and imine N atoms from two Schiff base ligands, in a highly distorted square-planar geometry. The O- and N-donor atoms are mutually trans and the dihedral angle between the two benzene rings is 55.8 (3)°.