Question

(vi) Which of the following compound does not contain reactive methylene group.
(a) CH3-CH-CH
(b) CH-CO-CH-COOEt
Eto
d8
8c
(C) CH3-CO-CH2-CN
(d) EtO-C-CH2-C-OEt​

Answer 1

b)CH-CO-CH-COOE

Eto

d8

8c

Answer 2

CH3-CH-CH does not contain reactive methylene group.(option a)

Explanation:

• In option A there is no presence of the COCH3 or COOEt which is the example of methlyene group.
• In (option b)CH-CO-CH-COOEtEtod88c has a Ester(COOEt) in it which is belongs to the methylene group.
• In (option c)CH3-CO-CH2-CN has a Acetyl which is belongs to methylene group.
• In (option d) EtO-C-CH2-C-OEt​ also there is a presence of Ester which is belongs to methylene group.
• Reactive methylene group is nothing but methylene group contacted with the two electron withdrawing functional group.