Characterization and Evaluation of Standard Enthalpy of Vaporization and Kinetic Studies of Volatile bis(<i>N</i>-ethyl-5-methyl-salicylaldimine)nickel(II) Complex  

作　　者：Thevabakthi Siluvai Muthu Arul Jeevan Maria Francis George Johnson Atnafu Guadie Assefa Sebastian Arockiasamy Karachalacheruvu Seetharamaiah Nagaraja 

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

出　　处：《American Journal of Analytical Chemistry》2015年第2期156-163,共8页美国分析化学（英文）

摘　　要：The bis(N-ethyl-5-methylsalicylaldimine)nickel(II) [Ni(5-me-saletN)2] complex was synthesized and characterized by elemental analyses, FT-IR, TG-DTA, mass spectrometry and vapour pressure measurement studies. The TG curve of the complex showed a single-step weight loss commencing from 490 K to nil residue at 600 K, without competing fragmentation step. The non-isothermal vaporization activation energy value determined by Coats-Redfern method yielded the value of 93.5 ± 7 kJmol–1. The dynamic TG run proved the complex to be completely volatile. And the equilibrium vapour pressure of the complex over the temperature range of 421 - 524 K, determined by the TG-based transpiration technique yielded the value of 94.2 ± 1.2 kJmol–1 for its standard enthalpy of vaporization . The entropy of vaporization was calculated from the intercept and found to be 249.4 ± 2.6 Jmol–1&bull;K–1.The bis(N-ethyl-5-methylsalicylaldimine)nickel(II) [Ni(5-me-saletN)2] complex was synthesized and characterized by elemental analyses, FT-IR, TG-DTA, mass spectrometry and vapour pressure measurement studies. The TG curve of the complex showed a single-step weight loss commencing from 490 K to nil residue at 600 K, without competing fragmentation step. The non-isothermal vaporization activation energy value determined by Coats-Redfern method yielded the value of 93.5 ± 7 kJmol–1. The dynamic TG run proved the complex to be completely volatile. And the equilibrium vapour pressure of the complex over the temperature range of 421 - 524 K, determined by the TG-based transpiration technique yielded the value of 94.2 ± 1.2 kJmol–1 for its standard enthalpy of vaporization . The entropy of vaporization was calculated from the intercept and found to be 249.4 ± 2.6 Jmol–1&bull;K–1.

关 键 词：NICKEL Complexes Enthalpy of VAPORIZATION THERMOGRAVIMETRY Vapour Pressure Kinetic Studies 

分 类 号：O6[理学—化学]