Thermal, spectral, magnetic and electrical studies of cobalt(II) and nickel(II) with 3-(3-pyridyl)acrylic acid

Add time:08/05/2019    Source:sciencedirect.com

The preparation and some properties of the complexes of 3-(3-pyridyl)acrylic acid with cobalt and nickel are described. Spectral, magnetic and solubility studies show that the complexes, which are hydrated, have polymeric octahedral structures. The thermal behaviour of these compounds has been studied by thermogravimetry (TG) and differential thermal analysis (DTA). Thermal decomposition studies show that the compounds lose water of crystallization followed by organic ligand to give the metal oxide. Electrical conductivity measurements at room temperature give results of 1.00×10−6 Ω−1 m−1 and (1.6 ± 0.4)×10−4 Ω−1 m−1 for the cobalt and nickel complexes respectively. The current-voltage characteristics exhibit hysteresis, which is very marked for the nickel compound, and is attributed to current arising from dipolar orientation superimposed on a conduction current.

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