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1 Polish Journal of Chemistry

1 2004

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An Anionic Moiety, MCl2- 4 (M=copper, zinc, cadmium and mercury) Stabilized by Bis(diethylenetriamine)copper(II) Cation

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Siddiqi K. , Rafat F. , Siddiqi M. , Lutfullah , Chebude Y.

Polish Journal of Chemistry

2004

tom Vol.78 /nr 11-12

2047-2053

Bimetallic complexes of the type [Cu(dien)2][MCl4], where M = Cu(II), Zn(II), Cd(II) and Hg(II), were prepared by reacting bis(diethylenetriamine)copper(II) dichloride with copper, zinc, cadmium and mercury dichlorides in ethanol. They have been characterized by elemental analyses, IR, electronic and EPR spectra, magnetic moment, TGAand conductivity measurements. Electrical conductivity of all the complexes indicated them to be 1:1 electrolyte in DMF and that the copper(II) ion is paramagnetic, maintaining its octahedral geometry, while metal ions in the anionic moiety of the complexes achieve their usual tetrahedral environment. An augmented magnetic moment has been observed in the [Cu(dien)2][CuCl4] complex, which is attributed to the ferromagnetic effect. From the EPR spectra, the Cu-Cu distance (rjk) has been found to be larger in [Cu(dien)2][CdCl4] than in [Cu(dien)2][CuCl4]. The TGAof [Cu(dien)2][CuCl4] showed the decomposition of various fragments between 226 to 1000 graduate C.