2005年2月
Calorimetric study on complexation of copper(II) ion with some amide solvents in acetonitrile
Thermochimica Acta
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- 巻
- 431
- 号
- 開始ページ
- 29
- 終了ページ
- 32
- DOI
- 10.1016/j.tca.2005.01.023
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 dm -3 (C 2 H 5 ) 4 ClO 4 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. © 2005 Elsevier B.V. All rights reserved.
- リンク情報
- ID情報
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- DOI : 10.1016/j.tca.2005.01.023
- ISSN : 0040-6031
- SCOPUS ID : 20144380985