Empirical correlations between thermodynamic and spectroscopic properties of aqueous solutions of alkan-m,n-diols: excess enthalpies and spin-lattice relaxation times at 298.15 K.

The heats of diln. in water and nuclear relaxation times at 298.15 were detd. for binary aq. solns. contg. alkan-a,w-diols and for ternary aq. solns. contg. the probe mol. hexane-1,2- or hexane-1,6-diol and one of the members of the homologous series of alkane-1,2-diols and of alkane-a,w-diols, up to heptane-1,7-diol. The results were interpreted through the model of preferential orientation, i.e. the "side-on" model, already proposed to explain the interactions in soln. between various positional isomers of hydroxylated substances. For binary solns., a correlation is presented between the relaxation times and the enthalpic self-interaction coeffs.