4 - 28 Esters
● ***Functional group —COO—
● Formed by reaction of an alcohol with a carboxylic acid
● ***Condensation reaction: 2 molecules join together, making a larger molecule and
a molecule of water
● ***General formula: RCOOR’
Making a simple ester: ethyl ethanoate (esterification)
● CH3COOH (l) + CH3CH2OH (l) ⇌ CH3COOCH2CH3 (l) + H2O (l)
- Starting materials: ethanol, ethanoic acid
- Catalyst: concd H2SO4
- Conditions: heat gently
- Observations: fruity smell
Drawing and naming of esters***
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1
● ***Functional group —COO—
● Formed by reaction of an alcohol with a carboxylic acid
● ***Condensation reaction: 2 molecules join together, making a larger molecule and
a molecule of water
● ***General formula: RCOOR’
Making a simple ester: ethyl ethanoate (esterification)
● CH3COOH (l) + CH3CH2OH (l) ⇌ CH3COOCH2CH3 (l) + H2O (l)
- Starting materials: ethanol, ethanoic acid
- Catalyst: concd H2SO4
- Conditions: heat gently
- Observations: fruity smell
Drawing and naming of esters***
●
1