CIE A Level Chemistry

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First teaching 2020

Last exams 2024

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7.5.5 Production of Esters

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Production of Esters by Reacting Alcohols With Acyl Chlorides

  • Esters are organic compounds with an -COR functional group
  • They have characteristic smells and are used in perfumes, cosmetics and as solvents
  • Esters can be prepared from the condensation reaction between alcohols and carboxylic acids
    • This is also called an esterification reaction

  • A more effective way of preparing esters is from the condensation reaction between alcohols and acyl chlorides instead
  • Unlike the reactions with carboxylic acids, acyl chlorides are more reactive (so the reactions happen faster) and their reactions go to completion (so no equilibrium mixture is formed and the yield of the ester is maximum)
  • Examples of esterification reactions include:
    • Formation of ethyl ethanoate from ethanol and ethanoyl chloride
    • Formation of phenyl benzoate from phenol and benzoyl chloride

Carboxylic Acids _ Derivatives - Esterification Reactions, downloadable AS & A Level Chemistry revision notes

Formation of esters from the reaction of alcohols with acyl chlorides

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Fran studied for a BSc in Chemistry with Forensic Science, and since graduating taught A level Chemistry in the UK for over 11 years. She studied for an MBA in Senior Leadership, and has held a number of roles during her time in Education, including Head of Chemistry, Head of Science and most recently as an Assistant Headteacher. In this role, she used her passion for education to drive improvement and success for staff and students across a number of subjects in addition to Science, supporting them to achieve their full potential. Fran has co-written Science textbooks, delivered CPD for teachers, and worked as an examiner for a number of UK exam boards.