Why do you add hexanes (after toluene) in the recrystallization of the adduct in a Diels-Alder reaction?

Question

Addison Armstrong · Accepted Answer

This will help induce crystallization by modifying the initial solvent with one of differing polarity, in this case a non-polar solvent (hexanes) are added to the slightly more polar toluene.

Addison Armstrong · Answer

undefined Hexanes are added after toluene in the recrystallization of the adduct in a Diels-Alder reaction to dissolve any impurities that may be present in the crude product. Toluene is initially used to dissolve the crude product, but it may not effectively dissolve all impurities. Hexanes, being a nonpolar solvent, are added to further purify the product by dissolving impurities while leaving the desired compound unaffected. This selective solubility allows for the removal of impurities through filtration or decantation, resulting in a purer final product.