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Sireesha, B.
- Formation and Stability of Co(II), Ni(II), Cu(II) and Zn(II) Complexes of Pyridoxal Semicarbazone and Pyridoxal Thiosemicarbazone in Solution
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Authors
Affiliations
1 Department of Chemistry, Nizam College, OU, Hyderabad-500 001, IN
2 Department of Chemistry, Jawaharlal Nehru Technological University Hyderabad, Hyderabad-500 085, IN
1 Department of Chemistry, Nizam College, OU, Hyderabad-500 001, IN
2 Department of Chemistry, Jawaharlal Nehru Technological University Hyderabad, Hyderabad-500 085, IN
Source
Asian Journal of Research in Chemistry, Vol 9, No 12 (2016), Pagination: 626-628Abstract
The formation and stability of Pyridoxal semicarbazone (PLSC) and Pyridoxal thiosemicarbazone (PLTSC) Schiff base ligand (L) complexes of Co(II), Ni(II), Cu(II) and Zn(II) have been investigated by Irving-Rossotti pH-metric titration technique, at 30 ± 1°C and an ionic strength of 0.1M KNO3 in 70% v/v DMF-H2O medium. The acid dissociation constants (pKa) of the ligands and the stability constants of the metal complexes formed in solution were determined. The results indicate the formation of 1:1(ML) and 1:2(ML2) complexes in solution. The order of stability of the metal complexes with respect to the metal ions follows the Irwing - william's natural order, Co(II), Ni(II), Cu(II) > Zn(II).Keywords
Schiff Base, Transition Metals, pH Metry, Stability Constants.- Synthesis, Characterization, Equilibrium Studies and Antibacterial Studies of Co(II) Complex with Schiff Base Ligand Derived from Pyridoxal and 2,4-Dichlorobenzohydrazide
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Authors
Affiliations
1 Department of Chemistry, Nizam College, OU, Basheerbagh, Hyderabad-500001, Telangana, IN
2 Department of Chemistry, Jawaharlal Nehru Technological University Hyderabad, Kukatpally, Hyderabad-500085, Telangana, IN
1 Department of Chemistry, Nizam College, OU, Basheerbagh, Hyderabad-500001, Telangana, IN
2 Department of Chemistry, Jawaharlal Nehru Technological University Hyderabad, Kukatpally, Hyderabad-500085, Telangana, IN