Kinetics and Vapor Pressure Studies of bis(N-alkyl-2-hydroxonapthaldimine)nickel (II) (N-R = methyl to pentyl) Complexes
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Author(s)
Maria Francis George Johnson1, Thevabakthi Siluvai Muthu Arul Jeevan2, Sebastian Arockiasamy3, Karachalacheruvu Seetharamaiah Nagaraja1
Affiliation(s)
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.
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.
ABSTRACT
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<span "=""><span "="">•Jmol<span "="">–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<span "="">–1<span "=""><span "="">•K<span "="">–1 respectively. The non-isothermal vaporization activation energy was determined from Arrhenius and Coats-Redfern methods.
as 153.1 (±1.9), 122.9 (±0.3), 147.6 (±10.7), 151.8 (±10.9) and 114.7 (±5.3) k<span "=""><span "="">•Jmol<span "="">–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<span "="">–1<span "=""><span "="">•K<span "="">–1 respectively. The non-isothermal vaporization activation energy was determined from Arrhenius and Coats-Redfern methods.
KEYWORDS
Volatile Nickel Complexes, Thermal Properties, Vapor Pressure, Transpiration Technique, Enthalpy and Entropy of Vaporization, Vaporization Kinetics
Cite this paper
References
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.
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