Acetylacetone
The keto and enol forms of acetylacetone coexist in solution; these forms are tautomers .Hydrogen bonding in the enol reduces the steric repulsion between the carbonyl groups.The equilibrium constant tends to be high in nonpolar solvents~~疏水性
DMAC
This colorless, water miscible, high boiling liquid commonly used as a polar solvent in organic chemistry~~親水性