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)

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

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