Potentiometric and thermodynamic studies of 2-mercaptobenzothiazole complexes with selected metal ions | ||||
| Assiut University Journal of Multidisciplinary Scientific Research | ||||
| Volume 44, Issue 2, December 2015, Page 91-98 PDF (635.98 K) | ||||
| Document Type: Novel Research Articles | ||||
| DOI: 10.21608/aunj.2015.222243 | ||||
 View on SCiNiTO | ||||
| Abstract | ||||
| The complex-formation of the copper(II), rhenium(V) and nickel(II) metal ions with 2-mercaptobenzothiazole (MBT) have been investigated in 1 M hydrochloric acid. The compositions of complexes were determined, and their stepwise stability constants were calculated at 298, 308 and 318 K. The thermodynamic parameters such as, Gibb’s free energy change (ΔG), entropy change (ΔS) and enthalpy change (ΔH) associated with the complexation reactions were calculated 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. | ||||
| Keywords | ||||
| Potentiometry; Stability constant; Thermodynamic parameters | ||||
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