JEE Main Chemistry question
In how many of the following six structures is resonance genuinely possible: (1) an allylic-type carbocation, (2) an oxocarbenium ion CH₃–O⁺=CH₂, (3) CH₂=CH–CH=CH₂ (1,3-butadiene), (4) the isopropyl cation, CH₃–CH⁺–CH₃, (5) CH₃OH, (6) CH₃–CO–NH₂ (acetamide)?
Answer: 4
Solution
(1) The allylic cation delocalises its positive charge over an adjacent π-system — resonance. (2) The oxygen lone pair is directly adjacent to the empty *p*-orbital of the cationic carbon — resonance (oxocarbenium). (3) The two conjugated double bonds of butadiene allow electron delocalisation — resonance. (4) The
See the full step-by-step solution
Create a free account to read the complete working, and practise questions like this in a timed test.
Create a free account