Transition Metal Chemistry

, Volume 13, Issue 2, pp 116–119

Metal complexes of 2-(2′-or 8′-quinolyl)benzimidazoles and benzothiazoles

  • Marcella Massacesi
  • Rosalba Pinna
  • Giovanni Micera
  • Liliana Strinna Erre
  • Piero Savarino
Full Papers

DOI: 10.1007/BF01087801

Cite this article as:
Massacesi, M., Pinna, R., Micera, G. et al. Transition Met Chem (1988) 13: 116. doi:10.1007/BF01087801

Summary

The copper(II), cobalt(II) and nickel(II) chloride and bromide complexes with the ligands 2-(2′-quinolyl)-benzimidazole (qbi), 2-(4′-methyl-2′-quinolyl)benzimidazole (mqbi), 2-(4′-methyl-8′-quinolyl)benzothiazole (m'q'bt) have been prepared and characterized by analytical methods, magnetic measurements as well as by electronic absorption, e.s.r. and far i.r. spectra. Complexes of various stoichiometries have been isolated, namely MLX2 (all cobalt complexes with exception of the bromide qbi complex; the chloride and bromide nickel m'q'bt and mq'bt complexes), ML2X2 (M=Co,L=qbi and X=Br; M=Ni, L=mqbi, X=Cl or Br, M=Ni, L=qbi, X=Cl) and ML3X2(M=Ni, L=qbi or mqbi, X=Br). The cobalt ion has a distorted tetrahedral N2X2 coordination in all the CoLX2 complexes, whereas Co(qbi)2Br2 is six-coordinate. The following conclusions may be drawn for the nickel complexes: in those with the 1∶1 metal-to-ligand molar ratio the metal ion is four-or five-coordinate; in those with the 1∶2 and 1∶3 ratios the metal ion is hexa-coordinate, being essentially bound to four nitrogen atoms with halogens, oxygens from water or methanol or nitrogen atoms (from the third ligand) occupying the axial positions.

Copyright information

© Chapman and Hall Ltd 1988

Authors and Affiliations

  • Marcella Massacesi
    • 1
  • Rosalba Pinna
    • 1
  • Giovanni Micera
    • 2
  • Liliana Strinna Erre
    • 2
  • Piero Savarino
    • 3
  1. 1.Istituto di Chimica Generale, Inorganica ed AnaliticaUniversita' di CagliariCagliariItaly
  2. 2.Dipartimento di ChimicaUniversita' di SassariSassariItaly
  3. 3.Istituto di Chimica Organica IndustrialeUniversita' di TorinoTorinoItaly