Materials:

- Iron(III) chloride (FeCl3)

- Dimethylformamide (DMF)

- Organic compound (ligand)

- Glassware and stirrer

Procedure:

1. Dissolve FeCl3** in DMF in a glass vessel. Use gentle heat if needed.

2. Add the organic compound** maintaining the desired ligand-to-metal ratio and stir. Heat may be applied to facilitate the reaction.

3. Observe changes** such as color shifts or precipitation indicating complex formation.

4. Isolate the complex** through filtration if precipitated or solvent extraction if dissolved.

5. Characterize the complex** using techniques like UV-Vis or IR spectroscopy.

Safety: Use PPE and handle all materials in a fume hood.

I think you have to try Ultrasonicator with a minimum temperature of 60 C.