1. CH3COOH Ethanoic acid Carboxylic Acids
Have hydroxyl group bonded to carbonyl group.
Tart tasting.
Carboxylic acids are weak acids.
Name with the alkyl group and “oic acid”
CH3COOH
Ethanoic acid

2. Carboxylic Acids

3. Esters Found in many fruits and perfumes.
Products of condensation reaction between carboxylic acids and alcohols.
Nameing: the alcohol group becomes “yl” followed by the acid group ending in “oate” or “ate”
Ethyl butanoate:

4. Esterification reactions
1) salicylic acid + methanol  methyl salicylate
H+, heat
+ H2O
+ HOCH3

5. + H+, heat + H2O 2) salicylic acid + 3-methyl butanol
3-methyl butyl salicylate +
H+, heat
+ H2O

6. + H+, heat + H2O 3) ethanoic acid + 3-methyl butanol
3-methyl butyl ethanoate +
H+, heat
+ H2O

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4) propanoic acid + 3-methyl butanol
3-methyl butyl propanoate +
H+, heat
+ H2O
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8. Chirality Many pharmaceuticals are chiral.
S-ibuprofen
Many pharmaceuticals are chiral.
Often only one enantiomer is clinically active.

9. Chirality
Carbons with four different groups attached to them are handed, or chiral.
Optical isomers or stereoisomers
If one stereoisomer is “right-handed,” its enantiomer is “left-handed.”