Tuesday, February 5, 2008

carboxylic acid chlorides

Carboxylic acids can be converted into acid chlorides by treatment with phosphorous chlorides (PCl5, Pcl3) or thionyl chloride (SOcl2) in pyridine.

Acetic acid + Phosphorous Pentachloride = Acetyl chloride + POCl3 + HCL

acetic acid + PCl3 = Acetyl chloride + HePO3

acetic acid + thionyl chloride = acetyl chloride + sulphur dioxide + HCl

From benzoic acid we get benzoyl chloride

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