acids and esters. organic acids also called carboxylic acids functional group –where in chain?...
TRANSCRIPT
Acids and Esters
Organic Acids
• Also called carboxylic acids
• Functional group – Where in chain?
• Naming: Use HC root and add “oic acid” instead of ol
• Example: Ethanoic acid (acetic acid or vinegar)
C
O
OHCH3
C
O
OHCH3
Organic Acids
• Some have terrible smells– Butanoic acid (butyric acid) – rancid butter– Pentanoic acid (valeric acid) – vomit– 3-methyl-2-hexenoic acid – BO
• Dicarboxylic acids - monomers
• Alpha-hydroxy acids– Have alcohol group on carbon next to acid– Found in many foods– Also used for exfoliation
Esters
• Functional group is:– Where in chain?
• Naming: After common name of acid they come from with alkyl branch in front
• Example: ethyl acetate• No hydrogen bonding• Volatile• Nice smells• Nice flavors
C
O
O CH3CH2
CH3
C
O
O CH3CH3
Esters in Addition Polymers
• PMMA – polymethyl methacrylate (plexiglass)– Contact lenses and eyeglasses– Windows– Hospital incubators
Esters in Addition Polymers
• PVA – polyvinylacetate– Latex paints– Adhesives– Chewing gum
Large esters
• Form waxes– Lipstick– Ear wax– Ducks feathers
Acid + Alcohol = Ester
H18 – C6
• 5, 26, 29, 30, 31, 44, 48, 49, 51, 56
• Name all isomers