wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

The correct stability order of the anions formed due to the deprotonation of the following molecules is:

A
III > IV > II > I
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
IV > III > I > II
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
III > II > I > IV
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
II > III > IV > I
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A III > IV > II > I
The carbanions formed after the deprotonation,respectively, are:

Structure III and IV carboxylate ions are more stable than the structure I and structure II phenoxides ions because of the delocalisation of negative charge on O with the C=O bond in structure III and IV.
The I effect of Cl makes the carboxylate ion of structure II more stable than that of structure I.
On the other hand, the hyperconjugation effect of the CH3 group makes the carboxylate ion of structure IV less stable than that of structure III.

Therefore, the correct order of the carboxylate ion stability is:
III > IV > II > I

flag
Suggest Corrections
thumbs-up
1
Join BYJU'S Learning Program
Join BYJU'S Learning Program
CrossIcon