A tetranuclear mixed ligand copper(II) complex of a pyrazole containing Schiff base and a hydroxyhexahydropyrimidylpyrazole and copper(II) and nickel(II) complexes of the Schiff base having N-donor atoms have been investigated. A 2 equiv amount of 5-methyl-3-formylpyrazole (MPA) and 2 equiv of 1,3-diamino-2-propanol (1,3-DAP) on reaction with 1 equiv of copper(II) nitrate produce an unusual tet...

Oxovanadium(IV), manganese(II) and copper(II) complexes of a Schiff base ligand derived from 2,4-dihydroxyacetophenone and 1,2-diaminocyclohexane have been encapsulated in the nanocavity of zeolite-Y by flexible ligand method and characterized by metal analysis, IR spectroscopic studies and X-ray diffraction patterns. The encapsulated complexes abbreviated here as CuL-Y, MnL-Y and VOL-Y catalyz...

Metal complexes of Cu (II), Co (II), Ni (II) and Zn (II) of Schiff based derived from 5-bromo-2hydroxybenzaldehyde and 4-nitobenzenesulfonamide have been prepared and characterized on the basis of physical characteristics, micro-analytical data, H NMR, FTIR spectrum and electronic data. The spectrum data 1 exhibit coordination of Schiff base with metal through imine nitrogen and oxygen atom and...

The monomeric title nickel(II) complex of a salicylaldimine, [Ni(C(20)H(14)N(2)O(4))]·2CH(3)OH, was obtained by the reaction of 2,4-dihydroxy-benzaldehyde and 1,2-phenyl-enediamine with nickel(II) acetate. The Ni(II) atom is coordinated by two N atoms [Ni-N = 1.839 (2) Å] and two O atoms [Ni-O = 1.8253 (19) Å] in an approximately square-planar geometry. In the crystal structure, inter-molecular...

In the title compound, [Ni(C(22)H(17)BrN(2)O(4))]·CH(3)OH, the Ni(II) ion is in a slightly distorted square-planar geometry involving an N(2)O(2) atom set of the tetra-dentate Schiff base ligand. The asymmetric unit contains one nickel complex and one methanol solvent mol-ecule. The dihedral angle between the aromatic ring planes of the central aromatic ring and other two aromatic rings are 10....

In the title mononuclear nickel(II) complex, [Ni(C(12)H(17)N(2)O(2))(NCS)], the metal atom is four-coordinated in a tetra-hedrally distorted square-planar geometry by the phenolate O atom, the imine N atom and the amine N atom of the Schiff base ligand and by the N atom of a thio-cyanate ligand. In the crystal structure, centrosymmetrically related mol-ecules are linked into dimers through inte...

a series of schiff bases of ni(ii) and cu(ii) using acetylacetone (acac), salicylaldehyde (sal), ethylenediamine (en), and o-phenylendiarnine (dabe) were prepared and characterized. the electronic spectra of some copper chelates in various organic solvents depend strongly on the solvent used and the d-d band of cu(ii) shifts to red with the increase of the donor number (dn) of solvent. the colo...

The Carboxymethyl chitosan Schiff base (CSB) derivative and its cobalt and nickel complexes (CSB-Co & CSB-Ni) have synthesized. The FTIR results showed the interaction with the amine of Carboxymethyl chitosan and aldehyde confirming the Schiff base formation. The XRD results, in comparison to CMC, displayed weaker peaks, which shows a decrease in crystalline properties and also exhibits the amo...

The title complex, [Ni(2)(C(11)H(11)Br(2)N(2)O)(2)(NCS)(2)], is a thio-cyanate-bridged dinuclear nickel(II) complex. The asymmetric unit contains two molecules. Both Ni atoms in each molecule have a square-pyramidal coordination geometry, and each center is bound by one O and two N atoms of one Schiff base ligand and by one N atom of a bridging thio-cyanate ligand, which define the basal planes...

The deprotonated Schiff base ligand in the title salt, [Ni(C(9)H(10)N(3)O(2)S)(C(18)H(15)P)]Cl, functions as an N,O,S-chelating anion to the phosphine-coordinated nickel(II) atom, which exists in a distorted square-planar geometry. The hy-droxy group forms an intra-molecular O-H⋯O hydrogen bond. The two amino groups of the cation are hydrogen-bond donors to the chloride anion; the hydrogen bond...