HYDROGEN-BONDING .28. COMPARISON OF THE SOLVATION THEORIES OF ABRAHAM AND POOLE, USING A NEW ACIDIC GAS-LIQUID-CHROMATOGRAPHY STATIONARY-PHASE

The solvation theories of Abraham and of Poole have been applied to gas-liquid partition coefficients, log K, for 62 varied solutes on bis(3-allyl-4-hydroxyphenyl)sulphone, with all K values corrected for interfacial adsorption. Application of the general solvation equation of Abraham, log K = c + rR2 - spi2H + aalpha2H + bbeta2H + l log L16, to log K values at 121 and 176-degrees-C shows that the new phase has considerable hydrogen-bond acidity. The solvation equation of Poole, DELTAG(s)SOLN(X) = DELTAG(s)CAV+DISP(X) + DELTAG(s)INT(X), was also applied to log K values at 121-degrees-C. It was shown that the terms (rR2 + spi2H + aalpha2H +bbeta2H) and -DELTAG(S)INT(X)/RT agreed to within 0.12 log unit for the total interaction effect for 23 varied solutes. Likewise, the combined cavity plus dispersion terms (c+l log L16) and -DELTAG(s)CAV+DISP(X)/RT agreed to within 0.11 log unit for the same 23 solutes. It is concluded that the solvation theories of Abraham and of Poole are entirely compatible and, indeed, yield essentially the same qualitative and quantitative results.