Polish Journal of Chemistry, ( ISI ), Volume (80), No (5), Year (2006-5) , Pages (719-727)

Title : Discussion on the complexing Ability of Macrocyclic Ligand, 12-Crown-4 with Li+ Cation in Some Binar ( Discussion on the complexing Ability of Macrocyclic Ligand, 12-Crown-4 with Li+ Cation in Some Binar )

Authors: Glamhossein Ronagi , R. Sanavi ,

Access to full-text not allowed by authors

Citation: BibTeX | EndNote

Abstract

The complexation reaction of Li+ cation with 12-crown-4 (12C4) was studied in acetonitrile (AN)-methanol (MeOH), nitromethane (NM)-dimethylformamide (DMF) and propylencarbonate (PC)-dimethylformamide (DMF) binary mixtures and in neat tetrahydrofuran (THF) at different temperatures using the conductometric method. The conductance data show that in all solvent systems, the stoichiometry of the complex formed between 12-crown-4 and Li+ cation is 1:1. The stability of (12C4-Li)+ complex is sensitive to the solvent composition. The stability order ofthe complex in pure non-aqueous solvents was found to be: AN > MeOH > PC > THF > DMF. The values of thermodynamic parameters (ΔH0c, ΔS0c) for formation of (12C4-Li)+ complex were obtained from temperature dependence of the stability constants and the results show that the thermodynamics of complexation reaction is affected by the nature and composition of the mixed solvents. A non-linear behaviour is observed between the thermodynamic parameters and the composition of the mixed solvents.

Keywords

, 12, crown, 4 (12C4);Li+ cation;acetonitrile, methanol; nitromethane, dimethylfonnamide; propylenecarbonate, dimethylformamide; tetrahydrofuran; conductometry
برای دانلود از شناسه و رمز عبور پرتال پویا استفاده کنید.

@article{paperid:202342,
author = {Ronagi, Glamhossein and R. Sanavi},
title = {Discussion on the complexing Ability of Macrocyclic Ligand, 12-Crown-4 with Li+ Cation in Some Binar},
journal = {Polish Journal of Chemistry},
year = {2006},
volume = {80},
number = {5},
month = {May},
issn = {0137-5083},
pages = {719--727},
numpages = {8},
keywords = {12-crown-4 (12C4);Li+ cation;acetonitrile-methanol; nitromethane-dimethylfonnamide; propylenecarbonate-dimethylformamide; tetrahydrofuran; conductometry},
}

[Download]

%0 Journal Article
%T Discussion on the complexing Ability of Macrocyclic Ligand, 12-Crown-4 with Li+ Cation in Some Binar
%A Ronagi, Glamhossein
%A R. Sanavi
%J Polish Journal of Chemistry
%@ 0137-5083
%D 2006

[Download]