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Question
Chemistry
Which of the following compounds would be the main product of an aldol condensation of acetaldehyde and acetone ?
Q. Which of the following compounds would be the main product of an aldol condensation of acetaldehyde and acetone ?
1458
207
UPSEE
UPSEE 2009
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A
C
H
3
C
H
=
C
H
⋅
C
H
O
B
C
H
3
C
H
=
C
H
COC
H
3
C
(
C
H
3
)
2
C
=
C
H
⋅
C
H
O
D
(
C
H
3
)
2
C
=
C
H
COC
H
3
Solution:
When aldehydes condense with ketones, it is the
α
-hydrogen atom of the ketone which involved in the aldol condensation.
C
H
3
C
H
O
+
H
C
H
2
COC
H
3
NaOH
major
C
H
3
C
H
(
O
H
)
C
H
2
COC
H
3
+
C
H
3
C
H
(
O
H
)
C
H
2
C
H
O
+
(
C
H
3
)
2
C
(
O
H
)
C
H
2
COC
H
3
+
(
C
H
3
)
2
C
(
O
H
)
−
C
H
2
C
H
O
major product
C
H
3
C
H
(
O
H
)
C
H
2
COC
H
3
Δ
-
H
2
O
major product
(
25%
)
C
H
3
C
H
=
C
H
COC
H
3