Example 1 :
Example 2 :
Example 3 :
Plz do mention mechanism of reactions .
Is the answer for Ex 1 option (1)
Example 1 , ans. given is option 3
What is the source.?
It is a simple question of Nucleophilic aromatic subsitution (SnAR) and then hydrolysis of CN .
In the above mechanism why did CN didn't replace Br ? ..Which effects enhanced CN to follow the above mentioned mechanism ?
No idea never seen something like this
double bond character is two high hence it can replace br
br is +m group -i group but -i is dominating in case of br..
cn dont have any such effect the product is decideded acc to br..