STUDIES ON N-[2-THIENYLMETHYLIDENE)-2-AMINOPYRIDINE COMPLEXES OF Fe(II), Co(II), Ni(II), Cu(II), Zn(II) AND Cd(II)
Abstract:
<p align="justify"> Metal complexes ML<sub>2</sub>Cl<sub>2</sub>, where M is Fe(II), Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) and L is Schiff base formed by condensation of 2-thiophenecarboxaldehyde and 2-aminopyridine, N-[2-thienylmethylidene]-2-arninopyridine (TNAPY), have been prepared and characterized by elemental analysis, magnetic and spectroscopic measurements. IR and NMR spectra show that the nitrogen of the azomethyne group and the sulphur of the thiophene ring take part in coordination. Magnetic, ESR and electronic spectral studies show a distorted octahedral structure for the Fe(II), Co(II), Ni(II) and Cu(II) complexes and a tetrahedral geometry for the Zn(II) and Cd(II) complexes. Conductance measurements suggest the nonelectrolytic nature of the complexes, with the exception of the Zn(TNAPY)<sub>2</sub>Cl<sub>2</sub> and Cd(TNAPY)<sub>2</sub>Cl<sub>2</sub> compounds which are 1:2 electrolytes. </p>
<p align="justify"> Metal complexes ML<sub>2</sub>Cl<sub>2</sub>, where M is Fe(II), Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) and L is Schiff base formed by condensation of 2-thiophenecarboxaldehyde and 2-aminopyridine, N-[2-thienylmethylidene]-2-arninopyridine (TNAPY), have been prepared and characterized by elemental analysis, magnetic and spectroscopic measurements. IR and NMR spectra show that the nitrogen of the azomethyne group and the sulphur of the thiophene ring take part in coordination. Magnetic, ESR and electronic spectral studies show a distorted octahedral structure for the Fe(II), Co(II), Ni(II) and Cu(II) complexes and a tetrahedral geometry for the Zn(II) and Cd(II) complexes. Conductance measurements suggest the nonelectrolytic nature of the complexes, with the exception of the Zn(TNAPY)<sub>2</sub>Cl<sub>2</sub> and Cd(TNAPY)<sub>2</sub>Cl<sub>2</sub> compounds which are 1:2 electrolytes. </p>
DOI: 10.48141/SBJCHEM.v9.n10.2001.20_2001.pdf
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