CH2CHOCH2

CH2CHOCH2, also known as acrolein dimer or 2-formyl-3,4-dihydro-2H-pyran, is a cyclic acetal formed by the Diels-Alder reaction of acrolein with itself. It is a colorless liquid with a characteristic odor. The compound exists as a mixture of isomers due to the presence of a chiral center. Its chemical formula is C6H8O2.

Acrolein dimer is typically produced by heating acrolein, a reactive aldehyde. The reaction is reversible and can be driven to form the dimer under controlled conditions. It is relatively stable compared to acrolein itself, which is a highly volatile and toxic compound. Acrolein dimer can be hydrolyzed back to acrolein under acidic conditions.

Industrially, acrolein dimer serves as an intermediate in the synthesis of various chemicals. It is used in the production of pharmaceuticals, agrochemicals, and polymers. Its reactivity allows for further functionalization and conversion into more complex molecules. Due to its potential to release acrolein, proper handling and storage procedures are necessary.