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The decreasing order of rate of reaction...

The decreasing order of rate of reaction for the following compounds towards `S_(N)2Th` (bimolecular nucleophilic substitution with tetrahedral intermediate) reaction is
(i) `CH_(3)-CH_(2)-overset(O)overset(||)C-NH_(2)`
(ii) `CH_(3)-CH_(2)-overset(O)overset(||)C-Br`
(iii) `CH_(3)-CH_(2)-overset(O)overset(||)C-O-overset(O)overset(||)C-CH_(2)-CH_(3)`
(iv) `CH_(3)-CH_(2)-overset(O)overset(||)C-O-C_(2)H_(5)`

A

1 and 3

B

2 and 4

C

1 and 4

D

2 and 3

Text Solution

Verified by Experts

The correct Answer is:
A
Protonation at site 1 and 3 is supported by resonance stabilization.
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