The molecule of (4 ′-phenyl)-1,2,4-triazol-1-ium-phenacylid (PTPhY) is studied in two types of ternary solutions. In the first category, the binary solvent contains two hydroxyl miscible liquids, and the second one contains one protic and one non-protic solvents. The potential energy in pairs of the type hydroxyl solvent-ylid is estimated in the frame of the statistical cell model of ternary solutions. From the viewpoint of interactions in the first ylid solvation shell, the statistical average weight of the active solvent differs from its molar fraction in the binary solvent.

No abstract

No abstract

A simple method for determining the linear birefringence of the thin layers based on the determination of the orientation of the polarization ellipse of totally polarized light is proposed and it is applied to PVA thin foils. Theoretical notions and the experimental procedure are described. The linear birefringence of polymer thin foils with different degrees of stretching is determined and the applicability of the method is discussed.

Some electro-optical characteristics of four carbanion monosubstituted triazolium ylids - precursors in obtaining new heterocycle derivatives with pharmaceutical and industrial applications - were evaluated by spectral and quantum-mechanics studies. The physical properties were established for the optimized structures of triazolium ylids using HyperChem 8. The nature of the interactions solute-solvent in the triazolium ylid solutions was established by correlations between the polarity/polarizability characteristics of the solution components and the wavenumbers of the visible band.