# What is the role of dichloromethane in the ozonolysis / Criegee oxidation?

Why is $$\ce{CH2Cl2}$$ used in ozonolysis of alkenes and alkynes? What role does it play in the reaction? Is dichloromethane a common solvent for organic reactions and used for its inertness, or is it particularly used in ozonolysis reactions? If it is the latter case, how does it enhance the ozonolysis reaction?

• All of my ozonolyses to date were in dichloromethan …
– Jan
Oct 5 '15 at 13:01
• Is $\ce{Ch2Cl2}$ used as an indicator for the complete reaction? Oct 5 '15 at 13:13
• CH2Cl2 is a nice solvent as it boils at 42 C, making it very easy to remove, and doesn't produce peroxides. This makes it excellent for many reactions. Unfortunately, it requires quite uncommon CaH2 for deep drying. Jan 18 '16 at 15:24