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

Arrange the following alcohols in order of reactivity towards gaseous HBr:
1071301_a82d825931aa4cdc86fee4b742fd6c12.png

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

The correct option is B I>IV>II>III
The reaction with gaseous HBr and alcohols involve the formation of carbocations. Thus, the stable the intermediate carbocation, the faster the reaction will proceed. We can see the corresponding carbocations and observe that they all are 2° carbocations. The stability factor will be determined by the -I group (F). -I groups destabilise carbocations and thus III will be least stable due to the presence of two F groups. IV will be comparatively stabler than II as the F group is located farther away from the positively charged carbon.
Hence, the correct order of reactivity will be:
I>IV>II>III
Thus, Option B is correct.
1055226_1071301_ans_38e17d82c9814eb48d4524da786740aa.png

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Chemical Properties of Alcohols 1
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon