Józef Śliwiok

Chromatographic investigation of the hydrophobic properties of isomeric naphthalene derivatives

SummarySelected isomeric α and β derivatives of naphthalene were semi-quantitatively compared in respect of their hydrophobic properties. Investigations were carried out by both adsorption and partition TLC chromatography; the solubilities of the individual substances in water were also determined. The results were explained of electronic and steric effects. Permanent dipole moments in terms (literature data) are also utilized to explain the comparatively weak hydrophobic properties of the β isomers as compared to the α isomers.

Investigation of the self association of higher fatty alcohols and acids on chromatographic sorbents

SummaryThree different sorbents, one with high activity (silica gel), the second with medium activity (cellulose powder) and the third having low activity (chromatographic paper) were compared in respect of their usefulness for the evaluation of the self association of selected higher fatty alcohols and acids. The obtained results are correlated with IR spectroscopic data and theoretical considerations.

Investigation of self-association of the selected glycols on cellulose sorbents

Abstract A comparison was performed of the selected glycols, i.e., 1,2-ethanediol, 1,3-propanediol, 1,4-butanediol, and 1,5-pentanediol, in respect of their ability to form intramolecular hydrogen bonds. The following analytical techniques were employed: ir absorption spectroscopy and a new method taking advantage of chromatographic paper.

Reversed-phase high-performance liquid chromatography in the investigation of the hydrophobicity of selected ketones

Abstract Reversed-phase high-performance liquid chromatography was used to compare the hydrophobicities of ketones, the capacity factor, which was determined by extrapolation to 100% water in the mobile phase, being applied as the hydrophobic parameter. Different methods (lineaer, quadratic and exponential) of performing the extrapolation were compared. The chromatographic data obtained were compared with the solubilities in water, the topological indexes, the partition coefficients calculated on the basis of Rekker fragmentary constants and the electron density, which was calculated by quanto-mechanical methods.

The influence of hydrogen-bond association on the destruction of hydroperoxides in the autoxidation process of oleyl alcohol, oleic acid, and methyl oleate

Abstract The autoxidation process of oleyl alcohol, oleic acid, and methyl oleate at 40, 50, and 60 °C was considered with the special stress laid upon the mechanism of cumulating and destruction of peroxidic products. Interpretation of the observed differences was based on the hydrogen-bond association patterns.

Chromatographic characteristics of porphyrine ether glycerides

SummaryEfficient TLC and HPLC conditions for the separation of a newly synthesized class of compounds, porphyrine ether glycerides, have been established. Supplementary physico-chemical characteristics are given for this group of solutes.

Separation of monofunctional isomeric naphthalene derivatives by means of liquid chromatography

Abstract An effort was undertaken to establish principal regularities enabling liquid chromatographic identification of the selected monofunctional isomeric naphthalene derivatives. An explanation was offered taking advantage both of the structural and the dipole moment characteristics, aiming to ground a significant differentiation between the chromatographic behavior of the α and β isomer series.

Chromatographic and topological dependence in tracing of the hydrophobic properties with the selected disubstituted benzenes

Abstract The performed investigations give evidence of applicability of topological indices to the qualitative estimation of the hydrophobic properties with the selected disubstituted benzene derivatives.