کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
215648 1426259 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Volumetric and steric properties of hydroxamic acids in ethanol at different temperatures
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Volumetric and steric properties of hydroxamic acids in ethanol at different temperatures
چکیده انگلیسی

Physical properties, such as density, ρ and refractive index, n of two hydroxamic acids (N-Phenylbenzo, C6H5NOH·C6H5CO and N-o-tolylbenzo, o-CH3·C6H4NOH·C6H5CO) have been measured in ethanol as a function of concentration at T = (298.15, 303.15, and 308.15) K. The apparent molar volume, VϕVϕ, apparent molar volume at infinite dilution, Vϕ0 and the slope, SV∗ are calculated from the experimental value of density, ρ   by applying the Masson’s equation. The apparent molar expansibility at infinite dilution, ϕE0, molar volume, V and the excess molar volume, VE are also computed. The refractive index, n, data have been used to calculate the steric parameters viz. molar refraction, RM, excess refractive index, nE  , excess molar refraction, RME and polarizability, α of these molecules. The results obtained have been qualitatively used to interpret the solute–solute and solute–solvent interactions between hydroxamic acids and ethanol.

Figure optionsDownload as PowerPoint slideHighlights
► Density, ρ and refractive index, n of PBHA and o-TBHA are measured in ethanol at different temperatures.
► From the experimental value of ρ and n  , VϕVϕ, Vϕ0, SV∗, ϕE0, V, RM, RS and α are calculated.
► Excess properties such as VE  , RME, nE are also computed.
► The behaviour of these parameters suggests that PBHA and o-TBHA act as structure maker in ethanol.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Chemical Thermodynamics - Volume 54, November 2012, Pages 76–82
نویسندگان
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