Stability Constants of Phenanthraquinone Monothiosemi- carbazone Complexes with Bivalent Metal Ions
| Main Authors: | P. P. SINHA, S. K. SINDHWANI, R. P. SINGH |
|---|---|
| Format: | Article Journal |
| Bahasa: | eng |
| Terbitan: |
, 1983
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/6342814 |
Daftar Isi:
- Department of Chemistry, University of Delhi, Delhi-110 007 Manuscript received 21 July 1981, revised 22 April 1982, accepted 3 August 1983 Stability constants of complexes formed by Mg(II), Mn(II), Fe(II), Co(II), Ni(II), Zu(II), Cd(II) and Pb(II) with phenanthraquinone monothiosemicarbazone have been determined pH-metrically at 20±1° in 75% (v/v) dioxane and 0.1 M (NaCIO4) ionic strength. The values of Smin have also been calculated. The order of stability constants was found to be Mg(II) < Mn(II) < Co(II) < Ni(II) < Pb(II) <Zn(II)<Cd(II)<Fe(II). Thermodynamic stabilization energies (δH) of the complexes have also been calculated and the order is Ni(II)>Co(II)>Fe(II).