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Carboxylic acids and esters
Carboxylic acids
• RCOOH
• Weak acid i.e. undergo partial ionisation:
– RCOOH + H2O
⇌
RCOO- + H3O+
• Will react with
– Metals e.g. magnesium
– Alkalis e.g. sodium hydroxide
– Carbonates e.g. sodium carbonate
– Alcohols to make esters
esterification
RCOOH + R’OH ⇌
RCOOR’ + H2O
R – C – O – H H – O – R’ ⇌ R – C – O – R’ + H2O
⃦
⃦
O
O
ester
link
Esters
methanol
butanoic acid
methyl butanoate
Esters of propan-1,2,3-triol
• Glycerol – propan-1,2,3-triol
• + three long chain carboxylic acid
• Gives fat / oil (naturally occurring)
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