The Friedel-Crafts reaction of chloral with aromatic compounds to form aryltrichloromethylcarbinols is reviewed. The molar ratio of aluminium chloride to chloral is critical and varies from 0.15 to 2.0 depending on the solvent, steric considerations, and the reactivity of the aromatic ring. The reaction has been used to prepare several new compounds with carbon disulfide or excess aromatic compound as the solvent. From 2, 4- ...