Trichloroacetyl chloride is the organochlorine compound with the formula CCl3COCl. Iti s the acyl chloride of trichloroacetic acid. It is produced industrially by photooxidation of tetrachloroethylene:
CCl2=CCl2 + O → CCl3COCl The method proceeds by the isomerization of tetrachloroethylene oxide. It can also be formed by chlorination acetyl chloride or acetaldehyde in the presence of activated charcoal
Reactions and uses It is used in the manufacture of pharmaceuticals and plant protection compounds. In organic synthesis, Trichloroacetyl chloride serves as a precursor to dichloroketene:
CCl3COCl + Zn → CCl2=C=O + ZnCl2
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