کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9694083 | 1459639 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Calorimetric study on complexation of copper(II) ion with some amide solvents in acetonitrile
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
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چکیده انگلیسی
Complexation of copper(II) ion with some amide solvents such as N-methylformamide (NMF), formamide (FA), N,N-dimethylacetamide (DMA) and N-methylacetamide (NMA) has been studied by titration calorimetry in acetonitrile containing 0.1 mol dmâ3 (C2H5)4ClO4 as an ionic medium at 298 K. These amides coordinate to the metal ion to form a series of mononuclear complexes, and their formation constants, enthalpies and entropies have been obtained. Thermodynamic parameters of formation of Cu(NMF)2+ and Cu(FA)2+ are not significantly different from those of Cu(DMF)2+ (DMF: N,N-dimethylformamide), implying that a strong hydrogen-bonded structure of liquid NMF and FA are practically ruptured in the acetonitrile solution examined. The formation of Cu(DMA)2+ and Cu(NMA)2+ are appreciably less exothermic than the respective formation of Cu(DMF)2+ and Cu(NMF)2+ complexes, implying that the presence of the acetyl group causes steric hindrance upon its coordination to the metal ion.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 431, Issues 1â2, 15 June 2005, Pages 29-32
Journal: Thermochimica Acta - Volume 431, Issues 1â2, 15 June 2005, Pages 29-32
نویسندگان
Kenta Fujii, Toshihiko Endoh, Masatoki Yokoi, Yasuhiro Umebayashi, Shin-Ichi Ishiguro,