Author(s)

Maria Francis George Johnson¹, Thevabakthi Siluvai Muthu Arul Jeevan², Sebastian Arockiasamy³, Karachalacheruvu Seetharamaiah Nagaraja¹

¹Department of Chemistry, Loyola Institute of Frontier Energy (LIFE), Loyola College, Chennai, India.
²Department of Chemistry, College of Natural and Computational Sciences, University of Gondar, Gondar, Ethiopia.
³Department of Chemistry, School of Advanced Sciences (SAS), VIT University Chennai Campus, Chennai, India.

The complexes of bis[N-alkyl-2-hydroxonapthaldimine]nickel(II) (N-alkyl = methyl, ethyl, propyl, butyl or pentyl) were synthesized and their volatilization in N₂ atmosphere was demonstrated by the TG-based transpiration technique. The equilibrium vapor pressure of the complexes over a temperature span of 470 - 590 K was determined by adapting a horizontal dual arm single furnace thermoanalyser as a transpiration apparatus. It yielded as 153.1 (±1.9), 122.9 (±0.3), 147.6 (±10.7), 151.8 (±10.9) and 114.7 (±5.3) k·Jmol^–1 respectively. The entropies of vaporization for these complexes as calculated from the intercept of the linear fit expressions were found to be 319.7 (±3.9), 229.9 (±5.8), 317.8 (±17.2), 319.7 (±19.1) and 254.6 (±9.6) Jmo^–1·K^–1 respectively. The non-isothermal vaporization activation energy was determined from Arrhenius and Coats-Redfern methods.

Volatile Nickel Complexes, Thermal Properties, Vapor Pressure, Transpiration Technique, Enthalpy and Entropy of Vaporization, Vaporization Kinetics

Johnson, M. , Jeevan, T. , Arockiasamy, S. and Nagaraja, K. (2015) Kinetics and Vapor Pressure Studies of bis(N-alkyl-2-hydroxonapthaldimine)nickel (II) (N-R = methyl to pentyl) Complexes. American Journal of Analytical Chemistry, 6, 118-126. doi: 10.4236/ajac.2015.62011.