Acyl Chlorides
Acyl chlorides are derivatives of carboxylic acids in which the OH group has been replaced by a chlorine atom. Their functional group is -COCl and their general formula is RCOCl.
They are named by replacing the -oic acid ending of the parent acid with -oyl chloride. CH3COCl is ethanoyl chloride and CH3CH2COCl is propanoyl chloride.
Worked example: name CH3CH2CH2COCl. Count the carbons including the C of COCl: there are 4, so the parent acid is butanoic acid and the compound is butanoyl chloride.
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Key terms in this lesson
- nucleophilic addition-elimination
- A two-step mechanism in which a nucleophile first adds to the carbonyl carbon, then a leaving group is eliminated to reform the C=O bond.
More in Carboxylic Acids and Derivatives
- Hydrolysis of Esters
- Vegetable Oils and Fats
- Soap Making
- Biodiesel
- Acid Anhydrides
- Nucleophilic Addition-Elimination Mechanism
- Acylation of Water, Alcohols, Ammonia and Amines
- Manufacture of Aspirin
All 16 lessons in Carboxylic Acids and Derivatives · All AQA A-level Chemistry topics