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Journal of Thermal Analysis and Calorimetry

, Volume 111, Issue 1, pp 483–490 | Cite as

Synthesis and characterisation of Co(II), Ni(II), Zn(II) and Cd(II) complexes with 5-bromo-N,N′-bis-(salicylidene)-o-tolidine

  • Ionela Alan
  • Angela Kriza
  • Mihaela Badea
  • Nicolae Stanica
  • Rodica Olar
Article

Abstract

New complexes of type [M(HL)(CH3COO)(OH2)m]·nH2O (where M:Co, m = 2, n = 2; M:Ni, m = 2, n = 1.5; M:Zn, m = 0, n = 2.5 and M:Cd, m = 0, n = 0; H2L:5-bromo-N,N′-bis-(salicylidene)-o-tolidine) have been synthesized and characterized by microanalytical, IR, UV–Vis-NIR and magnetic data. Electronic spectra of Co(II) and Ni(II) complexes are characteristic for an octahedral stereochemistry. The IR spectra indicate a chelate coordination mode for mono-deprotonated Schiff base and a bidentate one for acetate ion. The thermal transformations are complex according to TG and DTA curves including dehydration, acetate decomposition and oxidative degradation of the Schiff base. The final product of decomposition is the most stable metallic oxide.

Keywords

5-bromosalicylaldehyde Complex 3,3′-dimethylbenzidine Schiff base Thermal behaviour 

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2012

Authors and Affiliations

  • Ionela Alan
    • 1
  • Angela Kriza
    • 1
  • Mihaela Badea
    • 1
  • Nicolae Stanica
    • 2
  • Rodica Olar
    • 1
  1. 1.Faculty of Chemistry, Department of Inorganic ChemistryUniversity of BucharestBucharestRomania
  2. 2.Romanian Academy, “Ilie Murgulescu” Physical Chemistry InstituteBucharestRomania

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