Synthesis and spectroscopic characterization of complexes of Cr(III), Cr(VI), Cu(III), Zn(II), Mo(VI), Pd(II), Ag(III), Au(III) and W(VI) with telluric acid

descriptionPublicationkeyboard_double_arrow_right Article 01 Mar 2013 English Publisher:Elsevier BVJournal:Journal of Molecular Structure, volume 1,036, pages 510-520 (issn: 0022-2860,

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Authors: Ian S. Butler; Heba Allah M. El-Sherbeny; Ibrahim M. Kenawy; Sahar I. Mostafa;

doi: 10.1016/j.molstruc.2012.11.017

Synthesis and spectroscopic characterization of complexes of Cr(III), Cr(VI), Cu(III), Zn(II), Mo(VI), Pd(II), Ag(III), Au(III) and W(VI) with telluric acid

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Abstract

Abstract New preparative methods are reported for telluric acid complexes, Na 5 [Cr(TeO 4 (OH) 2 ) 2 (H 2 O) 2 ], Na 6 [Zn(TeO 4 (OH) 2 ) 2 (H 2 O) 2 ], Na 6 [Pd(TeO 4 (OH) 2 ) 2 ], Na 5 [M(TeO 4 (OH) 2 ) 2 ] (M(III) = Cu, Ag, Au) and K 6 TeM 6 ′ O 24 (M′(VI) = Cr, Mo, W). Their structures were characterized on the basis of spectroscopic, crystallographic, magnetic and thermal measurements. The deprotonation constants of telluric acid and the stability constants of the Co(II), Ni(II), Cu(II), Zn(II) and Pd(II) complexes were determined by pH-metric measurements.

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