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10.4

10.4. Carboxylic Acids Esters Esterfications. Carboxylic acids. A carboxylic acid is an organic compound that contains the carboxyl group. Examples include acetic/ethanoic acid Oxalic acid Citric acid. The functional group is composed of two other functional groups,

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10.4

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  1. 10.4 Carboxylic Acids Esters Esterfications

  2. Carboxylic acids • A carboxylic acid is an organic compound that contains the carboxyl group. • Examples include • acetic/ethanoic acid • Oxalic acid • Citric acid

  3. The functional group is composed of two other functional groups, Naming carboxylic acids is straight forward: • Name the longest chain of carbons as before • Replace the “e” on the end of the name with “oic” acid Hydroxyl group Carbonyl group propane Propanoic acid

  4. Khan academy • https://www.khanacademy.org/science/organic-chemistry/carboxylic-acids-derivatives/naming-carboxylic-acids-sal/v/carboxylic-acid-naming

  5. 3-methylheptane • Name the following acids 3-methylheptanoic acid nonane nonanoicacid

  6. Esterification • Esterification is a reaction between a carboxylic acid and an alcohol, which creates an ester and water. • It is a sub category of a condensation reaction because water is a product

  7. Draw the esterification reactions between the following pairs of reactants • butanoicacid and ethanol • pentanoicacid and methanol

  8. Naming esters is somewhat annoying because the names come from the names of the alchohol and carboxylic acid that they are made from. • Made from butanoic acid and ethanol • Parent chain= Name the chain of carbons that came from the carboxylic acid, but drop the “oic acid” and replace with “oate” • Branch chain =Name the chain of carbons that came from the alcohol as you would a branch of the main chain • Leave a space between the branch and parent chain names

  9. Tip: • Drawing out esters in structural diagrams is often easier to visualize the compound

  10. Tip: how do you tell which chain used to be the carboxylic acid??? • Look for the carbon that is attached to two oxygen (one double bond, one single bond)

  11. http://www.chemguide.co.uk/organicprops/alcohols/esterification.htmlhttp://www.chemguide.co.uk/organicprops/alcohols/esterification.html

  12. Treat this group of carbons as a branch • Example This group of carbons comes from the acid b/c it has the double bonded oxygen ethyl butanoate ethyl butanoate

  13. H H • Name the following esters H

  14. Draw the following esters and identify the alcohol and acid that it was synthesized from • methyl hexanoate • butyl methanoate • propyl propanoate

  15. Homework • Complete practice questions

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