Polarographic Study of Ternary Complexes in Solution · Complex Formation Between Copper(II) 2,2-bipyridyl 1 · 1 Complex and Ligands Containing Oxygen and/ or Nitrogen Donor Atoms as Secondary Ligands
| Main Authors: | VINITA SRIVASTAVA, H. L. NIGAM |
|---|---|
| Format: | Article Journal |
| Terbitan: |
, 1982
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/6352693 |
Daftar Isi:
- Department of Chemistry, University of Allahabad, Allahabad-211 002 Electrode behaviour of some mixed-ligand complexes of Cu(II) with 2,2'-bipyridyl as primary ligand and some aliphatic, aromatic and amino acids and phenols as secondary ligands have been studied in aqueous potassium nitrate. All the complexe' are observed to undergo diffusion controlled, single-step, two electron irreversible electro-reduction at dme. The study has been made at three different temperatures namely 30, 35 and 40o and at the varying ratio of 1 : 1 : 1 and 1 : 2 : 1 for the metal: (primary ligand): (secondary ligand). Besides half wave potentials. E1⁄2, the formal rate constant, kt, the activation energy of rearrangement of the depolarizer, Qe, the activation energy of diffusion, Q D have been calculated for each system. It is observed that all the complexes follow a particular reaction mechanism with temperature and the half-wave potential shifts towards more positive side with rise of temperature indicating easier reduction. with the exception of the complexes with aromatic acids and catechol. Factors for this behaviour have been observed. The driving forees for the formation of ternary system• have been analysed. Discriminating nature of the parent :2,2'·bipyrldyl complex towards incoming secondary ligands bas been discussed.