TEMPLATE SYNTHESIS AND X-RAY STRUCTURE DETERMINATION OF UNSYMMETRICAL TETRADENTATE SCHIFF BASE COMPLEXES OF NICKEL(II) AND COPPER(II)
- 30 September 2001
- journal article
- Published by Taylor & Francis in Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry
- Vol. 31 (8) , 1519-1529
Abstract
Nickel(II) and copper(II) complexes of unsymmetrical tetradentate Schiff bases have been synthesized by the template reaction of the half-units N-(1-hydroxy-2-acetonaphthone)-1-amino-2-phenyleneimine) (HL) and N-(2-hydroxyacetophenone)-1-amino-2-phenyleneimine (HL1) with glyoxal monophenylhydrazone (HL2). The ligands (L-L2) and (L1-L2) formed are in situ, respectively. The complexes have been characterized by molar conductance, IR, 1H NMR and UV spectroscopy. The crystal structure of the Ni(II) complexes have been determined by X-ray crystallography and exhibit square-planar conformation. Crystals of Ni(L1-L2) are monoclinic, space group P21, with a = 10.2552(5), b = 7.3422(4), c = 12.2414(6) Å, β = 93.0910(10)°, Z = 2. Crystals of Ni(L-L2) are monoclinic, space group C2/c, with a = 24.5353(4), b = 9.8615(3), c = 22.2809(5) Å, β = 122.7710(10)°, Z = 8. The Ni-O and Ni-N bonds have very similar lengths and form a regular square-planar structure.Keywords
This publication has 13 references indexed in Scilit:
- Metal Complexes of Non-Symmetric Tetradentate Schiff Bases Derived from N-(1-hydroxy-2-acetonaphthone)-1-amino-2-phenyleneimineSynthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry, 2000
- Metal Complexes of Non-Symmetric Tetradentate Schiff Bases Derived from N-(2-Hydroxyacetophenone)-1-Amino-2-PhenyleneimineSynthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry, 2000
- Synthesis, characterization and electrochemical behaviour of some copper(II) complexes with linear and tripodal tetradentate ligands derived from Schiff basesPolyhedron, 1997
- Easy synthesis of ‘half-units’: their use as ligands or as precursors of non-symmetrical Schiff base complexesInorganica Chimica Acta, 1995
- Monomeric and dimeric copper(II) complexes of a redox active Schiff base ligand bis(2,5-dihydroxyacetophenone) ethylenediaminePolyhedron, 1994
- Nickel(II) complexes with unsymmetrical quadridentate Schiff bases having a pendant N-acyl substituentJ. Chem. Soc., Dalton Trans., 1992
- A further example of a dinuclear copper(II) complex involving monoatomic acetate bridges. Synthesis, crystal structure, and spectroscopic and magnetic properties of bis(.mu.-acetato)bis(7-amino-4-methyl-5-aza-3-hepten-2-onato(1-))dicopper(II)Inorganic Chemistry, 1985
- Synthesis and complexes of unsymmetrical multidentate ligands. Part III. Quadridentate ligandsInorganica Chimica Acta, 1980
- Syntheses and complexes of unsymmetrical multidentate ligands. Part I. Bidentate glyoxalanil(1)-phenylhydrazone-(2) ligandsInorganica Chimica Acta, 1979
- Complexes of Nickel(II) with Schiff Bases Formed from Salicylaldehydes and N-Substituted Ethylenediamines.IInorganic Chemistry, 1965