Enthalpies of solution and single ion enthalpies of transfer from water to dioxane–water mixtures

Standard enthalpies of solutions of sodium bromide, potassium bromide, tetrabutyl phosphonium bromide, tetraphenyl phosphonium bromide, and sodium tetraphenyl boron have been measured in 20%, 44.5%, and 64.5% dioxane–water mixture. On the extra thermodynamic assumption ΔΔHs(Ph4P+) = ΔΔHs(−BPh4) single ion enthalpies of transfer from water to dioxane–water mixtures have been calculated for various ions.