NDLI: A thermodynamic study of interaction of Ag$^{+}$, Mg$^{2+}$, Ca$^{2+}$, and K$^{+}$ cations with 4-hydroxyphenyl-2,5-bis(2-benzofuranyl)pyridine in some binary mixed non-aqueous solvents

Content Provider	Springer Nature Link
Author	Khoshod, Razieh Sanavi Hatami, Elaheh Arefi, Donya Makni, Fatemeh Zahra
Copyright Year	2016
Abstract	In the present work the complexation process between Ag$^{+}$ and Mg$^{2+}$ cations and 4-hydroxyphenyl-2,5-bis(2-benzofuranyl)pyridine (HBFPY) ligand was studied in pure dimethylformamide (DMF), ethanol (EtOH), acetonitrile (AN) and in (DMF-EtOH), (AN-EtOH) and (DMF-AN) binary mixed solvent solutions at different temperatures using the conductometric method. Also in this work the complexation reaction between Ca$^{2+}$, K$^{+}$ cations and HBFPY ligand, was studied in pure dimethylformamide (DMF), propanol (PrOH), 1,4-dioxane (DOX), ethanol (EtOH) and in DMF-PrOH, DMF-DOX and DMF-EtOH binary mixed solvent solutions at different temperatures using the conductometric method. The conductance data show that the stoichiometry of the complexes formed between this ligand and the studied cations is 1 : 1 [ML]. In most cases, addition of HBFPY to solutions of these cations, causes a continuous increase in the molar conductivities which indicates that the mobility of complexed cations is more than the uncomplexed ones. The stability constants of the complexes were obtained from fitting of molar conductivity curves using a computer program, GENPLOT. The stability constant of [Mg(HBFPY)]$^{2+}$ complex in various neat solvents at 15°C decreases in order: EtOH > DMF > AN and the stability constant of [Ag(HBFPY)]$^{+}$ complex in various neat solvents at 35°C decreases in order: DMF > EtOH. The values of standard enthalpy changes (ΔH°$_{ c }$) for complexation reactions were obtained from the slope of the Van’t Hoff plots and the changes in standard entropy (ΔS°$_{ c }$) were calculated from the relationship ΔH°$_{ c,295.15}$= ΔH°$_{ c }$–298.15ΔS°$_{ c }$.
Starting Page	308
Ending Page	317
Page Count	10
File Format	PDF
ISSN	00360244
Journal	Russian Journal of Physical Chemistry
Volume Number	90
Issue Number	2
e-ISSN	1531863X
Language	English
Publisher	Pleiades Publishing
Publisher Date	2016-01-07
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	conductometry dimethylformamide propanol dioxan ethanol acetonitrile, Ca$^{2+}$, K$^{+}$, Ag$^{+}$ and Mg$^{2+}$ Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry

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