question_answer

The   major   product   obtained   on monobromination \[(B{{r}_{2}}/FeB{{r}_{3}})\] of  the compound A is:

A)                  

B)       

C)    

D)

Correct Answer: B

Solution :

[b] Both \[OC{{H}_{3}}\]and \[C{{H}_{3}}\]are o, p-directing group. The possible positions of attack which are facilitated by both are shown by arrows: Since \[OC{{H}_{3}}\] group is bulkier than \[C{{H}_{3}}\] group, therefore, due to steric hindrance the reaction does not occur at positions 2 and 6 but instead it occur at position 4.