There are several solvents that can be used to recrystallize a Mn-salen complex. Some common choices include:

- Methanol

- Ethanol

- Isopropanol

- Acetonitrile

- Dichloromethane

- Chloroform

- Toluene

- Benzene

The best solvent for recrystallization will depend on the specific Mn-salen complex being recrystallized. The solubility of the complex in different solvents should be tested to determine the best choice. The complex should be dissolved in the chosen solvent at a temperature near the boiling point of the solvent. The solution should then be cooled slowly, allowing the complex to recrystallize. The crystals can be filtered and washed with cold solvent to remove any impurities.