Spectrophotometric and conductometric study of the complexation of N-salicylidene-2-aminophenol with Cu2+ in methanol + 1,4-dioxane binary solutions
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Published:2014
Issue:10
Volume:79
Page:1263-1277
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ISSN:0352-5139
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Container-title:Journal of the Serbian Chemical Society
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language:en
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Short-container-title:JSCS
Author:
Biswas Rashmidipta1,
Brahman Dhiraj1,
Sinha Biswajit1
Affiliation:
1. Department of Chemistry, University of North Bengal, Darjeeling, India
Abstract
The complexation reaction between N-salicylidene-2-aminophenol, abbreviated
as SAP, with Cu2+ ion was studied in binary mixtures of methanol and
1,4-dioxane by using conductometric and spectrophotometric method at
different temperatures. The stability constants (Kf) for the 1:1 complex,
Cu2+-SAP, were calculated from computer fitting of absorbance and molar
conductance data against various mole ratios (cM:cL or cL:cM) in different
binary solvent mixtures. A non-linear behaviour was observed for the
variation of logKf for the complex against the solvent compositions. Various
thermodynamic parameters (?H, ?S and ?G) for the formation of Cu2+-SAP
complex were determined from the temperature dependence of stability
constants (Kf). The overall results showed that the complexation reaction is
entropy driven and is affected by the nature and composition of the mixed
solvents.
Publisher
National Library of Serbia
Subject
General Chemistry