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Esters and Esterification

Esters and Esterification. Write condensed structural formulas for and name esters . Include : uses and functions of common esters Additional KEY Terms esterification. carbonyl group. O. alkoxy group. R. O. C. O. The functional group of esters is the ester group

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Esters and Esterification

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  1. Esters and Esterification

  2. Write condensed structural formulas for and name esters. • Include: uses and functions of common esters • Additional KEY Terms • esterification

  3. carbonyl group O alkoxy group R O C O • The functional group of esters is the ester group • general formula: R–COOR' • R- hydrocarbon chain from the acid • R' - hydrocarbon chain from the alcohol. • made by combiningcarboxylic acid and alcohol R'

  4. Esterification O H H ester O C-C O-C alcohol carboxyl acid DE-esterification Esterification is a reversible reaction. water

  5. O R O O C • Properties of Esters: • Polar covalent: < 5C (small) are soluble in water • Strong IMF (d-d)gives high bp/mp • But lower than alcohol/acids – NO H-bonding • Large esters account for flavour / odor of fruit EsterOdor isoamylacetate banana methyl salicylate wintergreen ethyl butyrate pineapple benzyl butyrate cherry benzyl acetate peach methyl butyrate apple octylacetate orange n-propyl acetate pear ethyl phenylacetate honey ethyl acetate fingernail polish remover δ- δ+ R'

  6. Naming Esters O // CH3-C \ O-CH2CH2CH3 2 – names: · First name alcohol: change- anolto - yl · Second name acid: change- ioc acid to - oate CH3COOCH2CH2CH3 alcohol acid propylethanoate

  7. CH3CH2CH2CO + OCH3 OH H butanoic acidmethanol CH3CH2CH2COOCH3 + H2O methylbutanoatewater

  8. CH3CH2CH2CH2CH2COOCH2CH2CH2CH3 butyl hexanoate

  9. Write the esterification reaction for the reaction between pentanoic acid and 1-butanol.

  10. CAN YOU / HAVE YOU? • Write condensed structural formulas for and name esters. • Include: uses and functions of common esters • Additional KEY Terms • esterification

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