Which of the following reactions would generate an electrophile? (I) (CH 3 ) 3 CBr + Anhy . AlCl 3 ( I I ) C H 3 – C H = C H 2 + H ⊕ ( I I I ) C 6 H 5 C O O H + H 3 O ⊕ ( I V ) H N O 3 + H 2 S O 4

Step-by-step solution

Here electrophile generation is possible in reactions I, II and IV as follows ( I ) ( I I ) C H 3 – C H = C H 2 + H ⊕ → C H 3 – C ⊕ H – C H 3 ( I I I ) C 6 H 5 C O O H + H 3 O ⊕ → n o reaction IV HNO 3 + H 2 SO 4 → NO 2 ⊕ + H 3 O ⊕ + H SO 4 −