<b>Studies on some VO(IV), Ni(II) and Cu(II) complexes of non-symmetrical tetradentate Schiff-bases</b>
The coordination chemistry of VO(IV), Ni(II) and Cu(II) with unsymmetrical Schiff base ligands, [HO(OCH<sub>3</sub>)C<sub>6</sub>H<sub>3</sub>C(CH<sub>3</sub>):N(CH<sub>2</sub>CH<sub>2</sub>)N:C(CH<sub>3</sub>)CH:C(C...
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| Format: | Article |
| Language: | English |
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Chemical Society of Ethiopia
2008-08-01
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| Series: | Bulletin of the Chemical Society of Ethiopia |
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| Online Access: | http://www.ajol.info/index.php/bcse/article/view/61288 |
| Summary: | The coordination chemistry of VO(IV), Ni(II) and Cu(II) with unsymmetrical Schiff base ligands, [HO(OCH<sub>3</sub>)C<sub>6</sub>H<sub>3</sub>C(CH<sub>3</sub>):N(CH<sub>2</sub>CH<sub>2</sub>)N:C(CH<sub>3</sub>)CH:C(C<sub>6</sub>H<sub>5</sub>)OH], H<sub>2</sub>L and [HO(OCH<sub>3</sub>)C<sub>6</sub>H<sub>3</sub>C(CH<sub>3</sub>):N(CH<sub>2</sub>CH<sub>2</sub>)N:C(CH<sub>3</sub>)CH:C(CH<sub>3</sub>)OH], H<sub>2</sub>L<sup>1</sup> (derived from condensation of 1-phenyl-1,3-butanedione/2,4-pentanedione, ethylenediamine and 5-methoxy-2-hydroxy acetophenone) is discussed. The metal complexes were characterized by elemental analysis, molar conductance, magnetic susceptibility, infrared and electronic spectral measurements. They are magnetically dilute, non-electrolytes in nitromethane. The ligands are tetradentately coordinating via the imine N and enolic O atoms, resulting in 5-coordinate square-pyramidal geometry for the VO(IV) complexes and 4-coordinate square-planar geometry for the Ni(II) and Cu(II) complexes. The assignment of geometry is supported by magnetic and spectral measurements. |
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| ISSN: | 1011-3924 1726-801X |