Polar-nonpolar terminology

Stepanova and Velikovskii (1970) stated that deviation from ideal behavior is connected with fugacity and activity. A paper on the prediction of vapor-liquid equilibrium for polar-nonpolar binary systems by Finch and Van Winkle is mentioned here because of the terminology and the principles involved. The 12 systems examined comprised systems such as ethylbenzene-hexylene glycol, n-octane-cellosolve, toluene-phenol, and n-heptane-toluene. It was pointed out that whereas the Scatchard-Hildebrand theory has had some success in predicting the vapor-liquid equilibria for nonpolar binary systems, it has proved to be unsatisfactory in the quantitative prediction of such equilibria for polar-polar systems and for polar-nonpolar systems. 

Several structural factors have been considered as possible causes of the anomeric effect. In localized valence bond terminology, there is a larger dipole-dipole repulsion between the polar bonds at the anomeric carbon in the equatorial conformation This dipole-dipole interaction is reduced in the axial conformation and this factor contributes to the solvent dependence of the anomeric effect. The preference for the axial orientation is highest in nonpolar solvent effects, where the effect of dipolar... 

Stearic acid (octadecanoic acid) is a waxy solid that is a component of animal and vegetable fats (see illustration). Stearic acid is used in cosmetics, as a dietary supplement, and to make candles. Arachidic acid (eicosanoic acid) is found in peanut oil as well as in fish oil. Certain terminology can be used, particularly for fatty acids that are found in nature. The carboxylic acid end is polar, associated with water solubility, and is labeled the delta (A) end of the fatty acid. The methyl end is associated with being nonpolar and more soluble in oils and is labeled the omega (O) end (see the labels in 92). 

Yen and McKetta called N2O weakly polar with a dipole moment of 0.17 Debye units. Their second paper was on a thermodynamic correlation of nonpolar gas solubilities in polar, nonassodated liquids and is a mathematically based approach. The only point to be mentioned here is that of terminology with reference to polar and nonpolar. ... 

---