Permittivities, Refractive Indices, Densities, and Excess Properties for Binary Systems Containing 1-Alkanols and Cyclopentanone

Abstract

This study reports the experimental relative permittivity, refractive index, and density data for several polar binary systems containing a cyclic ketone (cyclopentanone) and a series of alkanols from C 2 to C 10 over the entire composition range at T = 298.15 and p = 101.3 kPa. Further study was performed on a polar−nonpolar system composed of cyclopentanone and cyclohexane at the mentioned temperature and pressure. The experimental data were analyzed with various approaches in a consistence framework and in terms of intermolecular interactions between the constituent molecules. The effective and corrective Kirkwood correlation factors were calculated, in order to investigate the H-bond structure formation in the mixtures. The intermolecular interactions were investigated through various excess parameters, namely, excess permittivity, excess refractive index, excess molar volumes, excess Helmholtz energies, and excess Kirkwood correlation factors.

Dielectric, Volumetric, Refractometric, and Excess Properties of (Cycloalkanone + Pentanol Isomers) Systems at T = 298.15 K

“…The negative values of n E (φ) in the (CPO or CHO + primary and secondary pentanols) systems indicate that the dispersion forces between the constituent components are weaker than that in the pure state. The obtained excess result in this work is in the same trend as those of our previous report …”

“…The obtained excess result in this work is in the same trend as those of our previous report. 33 The negative n E (φ) values have also been reported for the systems containing the cyclic ketone and heavy alcohols (C 6 − C 10 ). Although pentanols with five carbon atoms are intermediate between the light and heavy alcohols, their excess data are similar to those of heavy alcohols.…”

“…This is because they have nearly zero hydrogen bond donor acidity (α ≈ 0), relatively high hydrogen bond acceptor basicity (β ≈ 0.54), and high Kamlet–Taft dipolarity/polarizability (π* ≈ 0.78). , However, they exhibit distinctly different thermodynamic and associative properties in the pure state and in mixtures. The molecular self-association due to the antiparallel dipole–dipole orientation is much stronger in pure CPO than in CHO molecules. − …”

“…In recent publications, − comparative and systematic studies have been performed on the different physicochemical (dielectric, optical, and volumetric) properties and their related excess behavior of a number of binary systems of cyclic ketones and alkanols/alkanediols. As an extension of the previous studies, the results of the dielectric, refractive index, and density measurements were analyzed for the various binary systems containing cyclic ketones (CPO and CHO) and a series of pentanol isomers (1-PA, 2-PA, 3-PA, IPA, and tert -PA) at 298.15 K and 101.3 kPa.…”

Comparative Dielectric Study and Molecular Interactions of Binary Mixtures of (Cyclohexanone + 1-Alkanols) and (Cyclopentanone or Cyclohexanone + Cyclohexanol or Cyclohexane) atT= 298.15 K

“…The dielectric constant and its related properties for hydrogen-bonded systems of pure ketones and alcohols are the center of many studies, but to the best of our knowledge, the permittivity and excess properties of various physical quantities of CPO or CHO + 1-alkanols or heavy alcohols have received little attention. The dielectric and thermophysical properties of the binary systems containing CPO and 1-alkanols at 298.15 K have been reported in one of our recent publication …”