The enthalpies of solution of cyclic ethers [1,4dioxane, 12-crown-4 (12C4), 15-crown-5 (15C5) and 18-crown-6 (18C6)] in N,N-dimethylformamide ? methanol (DMF ? MeOH) mixtures have been measured at 298.15 K. On the basis of the obtained data, the effect of the acid-base and structure-energetic properties of the DMF ? MeOH mixtures on the enthalpy of solution of cyclic ethers in these mixtures has been analyzed. The results have been compared with analogous data concerning the cyclic ethers in N,N-dimethylformamide ? water (DMF ? W) mixtures.
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