Question

The number of aldol reaction(s) that occurs in the given
transformation is :
CH₃CHO + 4HCHO□(→┴conc.aq.NaOH)
(a) 1 (b) 2
(c) 3 (d) 4

Answer 1

Explanation:

The number of aldol reaction(s) that occurs in the given

transformation is :

CH₃CHO + 4HCHO□(→┴conc.aq.NaOH)

(a) 1

(b) 2

(c) 3

(d) 4

Answer 2

3 cross aldol reactions will occur.

Explanation:

• Aldol condensation is a reaction between the aldehyde in presence of concentrated base.

• The aldol reaction needs alpha hydrogen of the aldehyde to be present.

• The aldol condensation leads to addition of two aldehyde molecules where one is converted to alcohol.

• Here in the ethanol, there are 3 alpha hydrogen.

• But in methanal, there's no alpha hydrogen.

• So, there will be 3 times aldol condensation on ethanal producing a tri alcohol aldehyde molecule.

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