The correct order of stability for the following carbocations is I II III IV · ABC26OR0791
Subject: Organic Chemistry · Chapter: General Organic Chemistry · Topic: Carbocation Stability · Exam: JAM 2005-2022 · Marks: 2 · Difficulty: Medium
The correct order of stability for the following carbocations is 
I 
II 
III 
IV
I II III IV(a)I $<$ III $<$ IV $<$ II
(b)III $<$ II $<$ IV $<$ I
(c)II $<$ IV $<$ III $<$ I
(d)IV $<$ III $<$ I $<$ II
Answer
Answer: C ✓ checked by 4AB · confidence medium
The source book printed no answer; this one was worked out and checked — see the explanation.
Explanation
Stability: cumyl (tertiary benzylic, I) > tert-butyl (III) > allyl (IV, primary but resonance-stabilised) > 2-norbornyl secondary cation (II) — II < IV < III < I (c).
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