Dielectric constants of acetonitrile, ?-butyrolactone, propylene carbonate, and 1,2-dimethoxyethane as a function of pressure and temperature

Autor:	Jacques E. Desnoyers, J.-M. St-Arnaud, Jean-François Côté, Gérald Perron, Jean-François Rouleau, Dany Brouillette
Rok vydání:	1996
Předmět:	Permittivity Nitrile Chemistry Biophysics Analytical chemistry Dielectric Biochemistry Isothermal process Dimethoxyethane Solvent chemistry.chemical_compound Propylene carbonate Organic chemistry Physical and Theoretical Chemistry Acetonitrile Molecular Biology
Zdroj:	Journal of Solution Chemistry. 25:1163-1173
ISSN:	1572-8927 0095-9782
DOI:	10.1007/bf00972644
Popis:	The dielectric constants ∈ of 1,2-dimethoxyethane, acetonitrile, γ-butyrolactone, and propylene carbonate were determined from capacitance measurements extrapolated to infinite frequency; ln ∈ are reported as a function of pressure up to 80 MPa at 15, 25, 35, 45°C and as a function of temperature in the range 10 to 50°C at 0.10133 MPa. The variation of ln ∈ with temperature or pressure can be expressed by a second order polynomial expression. The isothermal compressibilities β of the solvents were determined at 25°C from sound velocities, densities, and heat capacities. A simple correlation can be established between ∂ ln ∈/∂P and β for most aprotic solvent.
Databáze:	OpenAIRE
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