Co(II) and Cu(II) Schiff base complexes of bis(N-(4-diethylamino-2-methylphenyl)-3,5-di-tert-butylsalicylaldimine): Electrochemical and X-ray structural study

Ulusoy M., KARABIYIK H., KILINÇARSLAN R., AYGÜN M., Cetinkaya B., Garcia-Granda S.

STRUCTURAL CHEMISTRY, vol.19, no.5, pp.749-755, 2008 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 19 Issue: 5
  • Publication Date: 2008
  • Doi Number: 10.1007/s11224-008-9358-z
  • Journal Name: STRUCTURAL CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.749-755
  • Keywords: Steric hinderence, Schiff base ligand, Salicylaldimine, Copper complex, Cobalt complex, Crystal structure, COPPER(II) COMPLEXES, MOLECULAR-STRUCTURE, CRYSTAL-STRUCTURE, METAL-COMPLEXES, LIGANDS, STEREOCHEMISTRY, POLYMERIZATION, NICKEL(II), COBALT(II), CATALYSTS
  • Dokuz Eylül University Affiliated: Yes

Abstract

Copper(II) and cobalt(II) complexes of salicylaldimine obtained by the condensation of N,N-diethyl-2-methyl-1,4-phenylenediamine with 3,5-di-tert-butyl-2-hydroxybenzaldehyde have been synthesized and characterized by elemental analyses, magnetic susceptibility measurements, cyclic voltammetry, and FT-IR and UV-Vis spectroscopy. The molecular structure of the title copper(II) complex was determined by the single crystal X-ray diffraction technique. The Cu(II) center is coordinated by four atoms of the donor set in a compressed tetrahedral trans-[N2O2] environment, which can be essentially ascribed to the presence of bulky fragments of the ligand. The computed bond valences of the copper verify +2 oxidation state and indicate that the copper bonds, in particular Cu-N bonds, are elongated due to steric effects from bulky substituents in the ligands, N-(4-diethylamino-2-methylphenyl). Intermolecular C-H center dot center dot center dot pi interactions leading to centrosymmetric synthons serve to stabilize periodic organization of the molecules.