The Correct order of stability of the following carbonium ions is (I) (II) (III) · ABC26OR0782
Subject: Organic Chemistry · Chapter: General Organic Chemistry · Topic: Carbocation Stability · Exam: JAM 2005-2022 · Marks: 2 · Difficulty: Hard
The Correct order of stability of the following carbonium ions is 
(I) 
(II) 
(III)
(I) (II) (III)(a)II $>$ I $>$ III
(b)III $>$ II $>$ I
(c)I $>$ II $>$ II
(d)II $>$ III $>$ I
Answer
Answer: D ✓ checked by 4AB · confidence high
Explanation
The open tertiary 3-pentyl-type cation II is most stable; the bicyclo[2.2.2]octyl bridgehead cation III is strained; the 7-norbornyl cation I is very unstable — II > III > I (d).
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