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Asked Jul 29, 2019
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Expert Answer

Step 1

Step 1- The reaction of PhCH2CHO with NaOH is an example of Aldol condensation.

Aldol condensation-It is a condensation reaction in which an enol or an enolate ion reacts with a carbonyl compound to form a β-hydroxyaldehyde or a β-hydroxyketone, which on dehydration gives a conjugated diene. It can happen in two ways.

но
1.
но
1
Caaltic H"
R
CH2
CH3
Aldol addition product
Enol
H O
R
Aldol condenstaion
product
2.
но
ONa
O Na
Base (NaOH)
R
CH2
H
CH3
Aldol ad diton product
Enolate
-H,O
R
H
Aldol conden staion
product
help_outline

Image Transcriptionclose

но 1. но 1 Caaltic H" R CH2 CH3 Aldol addition product Enol H O R Aldol condenstaion product 2. но ONa O Na Base (NaOH) R CH2 H CH3 Aldol ad diton product Enolate -H,O R H Aldol conden staion product

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Step 2

Now, we have to react PhCH2CHO with NaOH. The reaction will follow the mechanism o...

ONa
alpha carbon
NaOH
CH2
Enolate
CH2
H
0-Na
Aldol-addition product
H
0-H
H
HO
Aldol conden sation
product
help_outline

Image Transcriptionclose

ONa alpha carbon NaOH CH2 Enolate CH2 H 0-Na Aldol-addition product H 0-H H HO Aldol conden sation product

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Organic reactions

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