In orderto evaporate the isopropyl acetate until the phenyl sulfone begins to precipitate, cool, add hexane (10 mL), chill in an ice bath then filter.The phenyl sulfone will be isolated as a melt. Solution In orderto evaporate the isopropyl acetate until the phenyl sulfone begins to precipitate, cool, add hexane (10 mL), chill in an ice bath then filter.The phenyl sulfone will be isolated as a melt..