**3.2 Crystallization of diastereoisomers**

The similarities between the enriching processes starting from enantiomeric mixtures or diastereoisomeric mixtures were already discussed above at the presentation of the solvent free methods. It is an interesting question: whether the widely used fractionated precipitation from a solvent will change this trend at the diastereoisomeric mixtures?

The diastereoisomeric systems discussed bellow contain salts, molecular complexes and coordinative complexes as well.
