Stability constants and thermodynamic parameters of cadmium complexes with sulfonamides and cephapirin

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Malkhan Singh Parihar
Farid Khan

Abstract

Stability constant (log 􀁠) and thermodynamic parameters of Cd2+ complexes with sulfonamide and cephapirin were determined by Polarographic technique at pH = 7.30 ± 0.01 and μ = 1.0 M
KNO3 at 250°C. The sulfonamides were sulfadiazine, sulfisoxazole, sulfamethaxazole, sulfamethazine, sulfathiazole, sulfacetamide and sulfanilamide used as primary ligands and cephapirin as secondary
ligand. Cd2+ formed 1:1:1, 1:2:1 and 1:1:2 complexes. The nature of electrode processes were reversible and diffusion controlled. The stability constants and thermodynamic parameters (􀂨G, 􀂨H
and 􀂨S) were determined. The formation of the metal complexes has been found to be spontaneous, exothermic in nature, and entropically unfavourable at higher temperature.

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How to Cite
Parihar, M. S., & Khan, F. (2008). Stability constants and thermodynamic parameters of cadmium complexes with sulfonamides and cephapirin. Eclética Química, 33(1), 29–34. https://doi.org/10.26850/1678-4618eqj.v33.1.2008.p29-34
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Original articles

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