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Indian Journal of Chemistry -Section A (IJC-A) >
IJC-A Vol.48A [2009] >
IJC-A Vol.48A(01) [January 2009] >
| Title: | Cobalt and nickel complexes of a hypodentate ligand, 2-[3-(pyridylamino)phenylazo]pyridine: Synthesis, structure and properties |
| Authors: | Banerjee, Priyabrata
Peng, Shie-Ming
Lee, Gene Hsiang
Goswami, Sreebrata |
| Keywords: | Cobalt
Nickel
Hypodentate ligands
Azo compounds
X-ray structure |
| Issue Date: | Jan-2009 |
| Publisher: | CSIR |
| IPC Code: | Int. Cl. ⁸ C07F15/04; C07F15/06 |
| Abstract: | Reactions of the salts MCl₂∙nH₂O (M = Co, Ni), with the extended azoaromatic ligand, 2-[3-(pyridylamino)-
phenylazo]pyridine (HL¹) afford the mononuclear complexes, [M(L¹)₂]m⁺ ( M=Co, m=1 and M=Ni, m=0) in high yields.
X-ray structure of the nickel complex is reported. The structural analysis has revealed that two monoanionic ligands
[L¹]⁻ bind the metal centre in a N₆-fashion using pairs of pyridyl-N, azo-N and deprotonated arylamido-N atoms. The two N(py) atoms (of the 3-amino pyridyl function) remain as pendents and unused. Positive ion ESI mass spectra of the complexes provide evidence for the integrity of the complexes in solution. Their UV-visible spectra consist of intense transitions in the low energy area of the visible region. Cyclic voltammetry of these complexes displays multiple reversible waves. The Co(III)/Co(II) reduction and Ni(II)/Ni(III) oxidation in their respective complexes appear at - 0.24 and 0.57V, respectively. |
| Page(s): | 25-29 |
| ISSN: | 0376-4710 |
| Source: | IJC-A Vol.48A(01) [January 2009]
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