Question

Part B Which of the following metal catalysts can switch the selectivity of ortho/para directing substitution to the meta position? Pd Cu Cs NO Submit Request Answer

Answer 1

the selectivity in We can use transition metals to switch electrophilic aromatic substitution, For meta selectivity we use Cu. f for ortho-para selectivity we use Pl. 30 answer of our give que. " Purine so in this structure we have total 5 electron pairs in conjugation 4 bond pairs & Į Jone pair of hitrogen. 50 5X2= 10 electrons. 30, we have 10 delocalised electrons in purine system.