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Chapter 13: Carbonyl Compounds III: Reactions at the α-Carbon
Exercises
Practice Exercise 1
Practice Exercise 1
This activity contains 5 questions.
What is the approximate p
K
a
of carbonyl compounds such as aldehydes, ketones, and esters?
-15 to -5
-5 to 5
10 to 15
15 to 25
25 to 35
Which of the following compounds has the highest p
K
a
?
acetone
ethyl acetoacetate
ethyl acetate
acetylacetone
What stabilizes the enol form of acetylacetone?
a: the C=C double bond is conjugated with a C=O bond
b: the enol engages in
inter
molecular hydrogen bonding
c: the enol engages in
intra
molecular hydrogen bonding
both a and b play a role
both a and c play a role
If propanal (CH
3
CH
2
-CH=O) is dissolved in deuterated water (D
2
O) that contains some base (
-
OD), what product will be formed?
CD
3
CD
2
-CH=O
CD
3
CD
2
-CD=O
CH
3
CD
2
-CH=O
CD
3
CH
3
-CH=O
CH
3
CH
2
-CD=O
Which of the following are true about a Claisen condensation?
a: The reactants are two molecules of an ester and an equivalent of a base.
b: The base is the same as the leaving group of the ester.
c: The products are a beta-keto ester and an alcohol.
All of the above are correct.
Only a and c are correct.
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