Please use this identifier to cite or link to this item:
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
Appears in Collections: IJC-A Vol.48A(01) [January 2009]

Files in This Item:
File Description SizeFormat 
IJCA 48A(1) 25-29.pdf199.12 kBAdobe PDFView/Open

Items in NOPR are protected by copyright, with all rights reserved, unless otherwise indicated.