Infinite Dilution Activity Coefficients of Organic Solutes in N,N-Diethyldodecanamide

Measurement of Activity Coefficients at Infinite Dilution of Chlorinated Solvents in Commercial Polyethylene Glycol Ethers

“…In several works (Weidlich and Gmehling, 1987;Nikolic et al, 1994), it is shown that the dominant error in the calculation of the retention volume is the uncertainty regarding the mass of stationary phase in the column, mt, and that the resulting error in the activity coefficient at infinite dilution y£ takes into account the uncertainties in the vapor pressure \ and in the second virial coefficient B22• The error in the determination of is estimated to be less than 1% for the presented systems.…”

“…When helium is used as carrier gas, eq 2 can be approximated by (Martire et al, 1979;Nikolic et al, 1994) In y2 = In 273.155 MAA (4) line and recording the pressure and temperature values at the flow meter. The column temperature was controlled within ±0.1 K. The pressure drop across the column, lying between 0.1 and 0.38 bar, was measured by a mercury differential manometer.…”

Volumetric Properties of Binary Mixtures of N-Ethylformamide with Tetrahydropyran, 2-Pentanone, and Propylacetate from (293.15 to 313.15) K

“…N -Substituted amides are the simplest model molecules having a peptide group, and consequently, many studies have been devoted to the intermolecular interactions of N -substituted amides. This paper is a part of our continuing and systematic investigation of the secondary amides in solutions from spectroscopic, − thermodynamic, , and densitometric , aspects. In our previous papers on excess molar volumes, we have studied the N -methylformamide (NMF) with 2-pentanone, propylacetate, and tetrahydropyran.…”