کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
215801 | 1426255 | 2013 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Apparent molar volumes and compressibilities of lanthanum, gadolinium, lutetium and sodium trifluoromethanesulfonates in N,N-dimethylformamide and N,N-dimethylacetamide Apparent molar volumes and compressibilities of lanthanum, gadolinium, lutetium and sodium trifluoromethanesulfonates in N,N-dimethylformamide and N,N-dimethylacetamide](/preview/png/215801.png)
The concentration and temperature dependencies of density of lanthanum, gadolinium, lutetium and sodium trifluoromethanesulfonates in N,N-dimethylformamide (DMF) and N,N-dimethylacetamide (DMA) have been determined. From density data the apparent molar volumes and partial molar volumes of the salts at infinite dilution as well as the expansibilities have been evaluated. The apparent molar isentropic compressibilities of lanthanum, gadolinium, lutetium and sodium trifluoromethanesulfonates in DMF and DMA have been calculated from sound velocity data obtained at 298.15 K. The results have been discussed in terms of ion–solvent interactions.
► In DMF the sequence values of both volumes and compressibilities of Ln3+ ions are: La3+ ≈ Gd3+ > Lu3+.
► In DMA the ionic volumes of lanthanoid(III) metal ions are, within error limits, identical.
► Obtained results are the consequence of an ion–solvent bonding nature.
Journal: The Journal of Chemical Thermodynamics - Volume 58, March 2013, Pages 46–54