Dielectric constantSolventsPartial double bondEnthalpy-entropy compensationMAGNETIC-RESONANCECHEMICAL-EXCHANGEBARRIERSMECHANISMThe purpose of this investigation is to determine if enthalpy-entropy compensation (EEC) is a valid concept when the experiments are performed on a set of molecules in multiple solvents...
Dependence of Ionic Mobility on Dielectric Constant of SolventBerns, D SFuoss, R M
E + b.B Here f ( ~ )is a dielectric constant function, usually taken as ( ( E q - 2- 11))//((q22~++ l), 2), f ( q ) is the refractive index function and E and B are measures of solvent electrophilic solvation ability and nucleophilic solvation ability, 3 ~ oarrecent ...
Since the mobility is strongly affected by theviscosityof the solvent and thedissociation constantsdepend on the dielectric constant of the solvent, the use of a nonaqueous solvent or a mixed solvent may improve electrophoretic separations (thesolvent effect). The other advantage of the use of a ...
Table II: Solvent miscibility table, cosolvent and antisolvent systems of acetaminophen. When the solubility values of acetaminophen and racemic (±)-ibuprofen at 25 °C were plotted against the dielectric constant of various solvents (see Table I) in which the APIs were solub...
ΔEintrin ¼ Ecomplex À Emonomer1 À Emonomer2 ð5Þ The solvent effects were included using the continuous model44, in which the specific solvent is characterized by its dielectric constant ε. The calculations were performed in the gas phase (ε = 1.0) and various solvents, ...
For the solvents studied in this work, the free energy of pyridine protonation becomes more negative with decreasing solvent polarity, or dielectric constant. Computational investigations of the preferred structures of solvent-dependent specific acids are used to estimate the pore-phase proton transfer ...
This theory argues that the mixed solvent solution cannot maintain ionic solutes in a solvated state due to the altered dielectric properties of the system. As an example, under this type of theory, adding ethanol to an aqueous nucleic acid solution lowers the solution dielectric constant, as ...
The calculated solvation free energy values depend strongly on the value assigned to the inner dielectric constant and on the choice of the set of atomic partial charges and radii. PARSE yields accurate transfer free energies between water and liquid alkane for small organic molecules, among them ...
Seduced by the simplicity of electrostatic solvation models, attempts at expressing solvent polarity quantitatively, usually involve physical solvent properties such as dielectric constant, dipole moment, or refractive index. But this procedure is often inadequate, especially since it does not take account...