Synthesis and characterization of copper(II) and cobalt(II) complexes with two new potentially hexadentate Schiff base ligands. X-ray crystal structure determination of one copper(II) complex |
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Authors: | Hassan Keypour Maryam Shayesteh Sadegh Salehzadeh Laura Valencia |
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Institution: | a Faculty of Chemistry, Bu-Ali Sina University, Hamedan 65174, Iran b Department of Chemistry, Shahid Beheshti University, Evin, Tehran 1983963113, Iran c Departamento de Química Inorgánica, Facultad de Química, Universidade de Vigo, 36310 Vigo, Pontevedra, Spain |
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Abstract: | Two new potentially hexadentate N2O4 Schiff base ligands 2-((z)-(2-(2-(2-((z)-3,5-di-tert-butyl-2-hydroxybenzylideneamino) phenoxy) phenoxy) phenylimino) methyl)-4,6-di-tert-butylphenol H2L1] and 2-((z)-(2-(2-(2-((z)-3,5-di-tert-butyl-2-hydroxybenzylideneamino) phenoxy)-5-tert-butylphenoxy) phenylimino) methyl)-4,6-di-tert-butylphenol H2L2] were prepared from the reaction of 3,5-di-tert-butyl-2-hydroxy benzaldehyde with 1,2-bis(2′-aminophenoxy)benzene or 1,2-bis(2′-aminophenoxy)-4-t-butylbenzene, respectively. From the direct reaction of ligands H2L1] and H2L2] with copper(II) and cobalt(II) salts in methanolic solution and in the presence of N(Et)3 the neutral CuL1], CuL2], CoL1] and CoL2] complexes were prepared. All complexes were characterized by IR spectra, elemental analysis, magnetic susceptibility, mass spectra, molar conductance (Λm), UV-Vis spectra and in the case of CuL2] with X-ray diffraction. X-ray crystal structure of CuL2] showed that the complex contains copper(II) in a distorted square planar environment of N2O2 donors. Three CH/π interactions were observed in the molecular structure of latter complex. |
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Keywords: | Schiff base Copper(II) complexes Cobalt(II) complexes X-ray structure 3 5-Di-tert-butyl-2-hydroxy benzaldehyde CH/π interaction |
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