Thermodynamics of the complexation between salicylaldehyde thiosemicarbazone with Cu2+ ion in methanol +1,4-dioxane binary solutions | Zendy

Rashmidipta Biswas | Zendy; Dhiraj Brahman | Zendy; Biswajit Sinha | Zendy

Open Access

Thermodynamics of the complexation between salicylaldehyde thiosemicarbazone with Cu2+ ion in methanol +1,4-dioxane binary solutions

Author(s) -

Rashmidipta Biswas,

Dhiraj Brahman,

Biswajit Sinha

Publication year - 2013

Publication title -

journal of the serbian chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.227

H-Index - 45

eISSN - 1820-7421

pISSN - 0352-5139

DOI - 10.2298/jsc130730137b

Subject(s) - chemistry , salicylaldehyde , methanol , solvent , absorbance , stability constants of complexes , conductance , inorganic chemistry , binary system , ion , semicarbazone , binary number , organic chemistry , chromatography , stereochemistry , schiff base , mathematics , arithmetic , combinatorics

The complexation reaction between salicylaldehyde thiosemicarbazone, abbreviated as STSC, with Cu2+ ion was studied in the binary mixtures of methanol + 1,4-dioxane binary by using UV-Visible spectrophotometric and conductometric methods at different temperatures. The formation constants (Kf) for the 1:1 complex, Cu2+-STSC, were calculated from computer fitting of the absorbance and molar conductance data against various mole ratios (cM:cL or cL:cM) in different binary solvent mixtures. A non-linear correlation was observed for the variation of logKf for the complex against the solvent compositions. Various thermodynamic parameters (ΔH, ΔS and ΔG) for the formation of Cu2+-STSC complex were also determined from the temperature dependence of the stability constants (Kf). The results showed that the complexation reaction is affected by the nature and composition of the mixed solvents

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