Aldol condensation reaction

Carbonyl compound which contains alpha-H gives aldol condenation reaction in presence of alkaline medium. The reaction between two molecules of acetaldehyde take placeas follows in presence of base Intramolecular aldol condensation reaction is given by

Aldol condensation is:

Aldol condensation is a reaction given by

Aldol and Name Reactions : " aldol condensation(name reaction)-1)aldol 2) cross aldol 3) intramolecular aldol 4) retro aldol "