کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5410994 1506569 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Geometrical structure, potentiometric and thermodynamic studies of rhodanine azodye and its metal complexes
ترجمه فارسی عنوان
ساختار هندسی، مطالعات پتانسیومتری و ترمودینامیکی ردانین آئودی و ترکیبات فلزی آن
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
چکیده انگلیسی
5-(2,3-Dimethyl-1-phenylpyrazol-5-one azo)-2-thioxo-4-thiazolidinone (HL) was synthesized and characterized using different spectroscopic techniques. The molecular structures of the ligand are optimized theoretically and the quantum chemical parameters are calculated. The proton-ligand dissociation constants of HL and its metal stability constants with Mn2 +, Co2 +, Ni2 + and Cu2 + have been determined potentiometrically. The potentiometric studies were carried out in 0.1 M KCl and 10% (by volume) DMF-water mixture. At constant temperature the stability constants of the formed complexes decreases in the order Cu2 +, Ni2 +, Co2 + and Mn2 +. The effect of temperature was studied at (298, 308 and 318 K) and the corresponding thermodynamic parameters (ΔG, ΔH and ΔS) were derived and discussed. The dissociation process is non-spontaneous, endothermic and entropically unfavorable. The formation of the metal complexes has been found to be spontaneous, endothermic and entropically favorable
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 201, January 2015, Pages 36-42
نویسندگان
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