wiz-icon
MyQuestionIcon
MyQuestionIcon
6
You visited us 6 times! Enjoying our articles? Unlock Full Access!
Question

Among the following compounds, what is the decreasing order of reactivity towards electrophilic substitution?

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

The correct option is A III > I > II > IV
This is an electrophilic substitution on benzene ring. As the electron density increases on the ring, the reaction becomes faster.
OCH3 group is electron donating by +M effect. CH3 group is also electron donating by +I and hyperconjugation but is weaker than OCH3. CF3 group is electron withdrawing and decreases the electron density on the ring. Hence, reaction is fastest with OCH3 group and is slowest with CF3 group present on the ring.
So, the correct order should be:
III > I > II > IV (Reactivity order towards electrophilic substitution)
Hence, (a) is correct.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Aminoacids and Proteins
BIOLOGY
Watch in App
Join BYJU'S Learning Program
CrossIcon