1. Characterize an ester functional group in terms of the following: a. The number of oxygen atoms that are present b. The minimum number of carbon atoms that must be present
1. Characterize an ester functional group in terms of the following:
a. The number of oxygen atoms that are present
b. The minimum number of carbon atoms that must be present
2. Differentiate the two hydrolytic reactions of esters.
3. Choose the correct answer.
i. Which compound has the higher boiling point—CH3CH2CH2COOH or CH3CH2CH2COOCH3? Justify your
answer.
ii. Which compound is more soluble in water—methyl acetate or octyl acetate? Justify your answer.
4. True or False: Write True if the statement is correct and False if otherwise.
i. Esters are formed by the reaction of a salt with an acid.
ii. In such reactions, the —OR group from the alcohol replaces the —OH group in the carboxylic acid.
iii. Esters are polar compounds, but they cannot form hydrogen bonds to each other.
iv. Their boiling points are lower than those of alcohols and acids of similar molecular mass
v. Esters cannot be converted back to carboxylic acids and alcohols under either acidic or basic
conditions.
vi. Thioesters are sulfur-containing analogs of esters in which a —SR group has replaced the —COOH
group.
vii. Polyesters are
linkages.
viii. An ester is named as an alkyl carboxylate.
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