Synthesis and characterization of some new Co(II) and Cd(II) macroacyclic Schiff-base complexes containing piperazine moiety |
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Authors: | Hassan Keypour Majid Rezaeivala Laura Valencia Paulo Pérez-Lourido Hamid Reza Khavasi |
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Institution: | 1. Faculty of Chemistry, Bu-Ali Sina University, Hamedan 65174, Iran;2. Departamento de Química Inorgánica, Facultad de Química, Universidade de Vigo, 36310 Vigo, Pontevedra, Spain;3. Department of Chemistry, Shahid Beheshti University, G.C., Evin, Tehran 1983963113, Iran |
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Abstract: | Three Cd(II) or Co(II) macroacyclic Schiff-base complexes CoL1Br]ClO4 (1), CdL2Cl]ClO4 (2) and CdL3(NO3)]ClO4 (3) were prepared by template condensation of 2-pyridinecarboxaldehyde and three different amines containing piperazine moiety, N,N′-bis(2-aminoethyl)piperazine, N,N′(2-aminoethyl)(3-aminopropyl)piperazine and N,N′-bis(3-aminopropyl)piperazine, in the presence of Co(II) or Cd(II) metal ions, respectively. All complexes have been studied with IR, FAB mass and microanalysis and for complex (3) by 1H and 13C NMR spectra. One of these complexes, CdL3(NO3)]ClO4 (3) has been characterized through X-ray crystallography. In complex (3), the Cd(II) ion is coordinated by the six nitrogen donor atoms from the ligand and by one oxygen atom from a monodentate nitrate ion in a N6O environment. |
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