Potentiometric and Thermodynamic Studies of 3-(Trichlorophenylsulphonamido)rhodanine Complexes with Some Metal Ions

• Autorzy: Hassanein, A.
• Języki publikacji: EN

Abstrakty

EN

Acid dissociation and complex stability constants of 3-(tricholophenylsulphonamido)rhodanine (TCSR) with some metal ions were determined potentiometrically in 0.1 KCl and 30% (v/v) sthanol-water mixture. The sequence of stability constants is: Th4 UO2+ 2 Cu2+ Ni2+ Co2+ n2+. The dissociation constants pK11 of TcSR and the stability constants log K of their complexes were determined at 298, 308 and 318 K. The corresponding therodynaic paraeters (deltaG, deltaH and deltaS) were derived and discussed. The dissociation process is non-spontaneous, endothermic and entropically unfavourable. The formation of the metal complexes has been found to be endothermic and entropically favourable.

Słowa kluczowe

EN

3-(trichlorophenylsulphonamido)rhodanine; dissociation and stability constants; thermodynamics

• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2000
• Tom: Vol. 74, nr 7
• Strony: 903-907

Twórcy

autor

Hassanein, A.

• Chemistry Department Faculty of Science Tanta University Tanta, Egypt