The product X in the following reaction sequence is · ABC26OR0897
Subject: Organic Chemistry · Chapter: Reagents, Reaction Mechanisms & Named Reactions · Topic: Reagents, Reaction Mechanisms & Named Reactions – General · Exam: JAM 2005-2022 · Marks: 2 · Difficulty: Easy
The product X in the following reaction sequence is 
(a)
(b)
(c)
(d)
Answer
Answer: D ✓ checked by 4AB · confidence high
Explanation
McMurry coupling gives bicyclopentylidene, and cold KMnO₄ gives the vicinal diol. Pinacol rearrangement with ring expansion gives spiro[4.5]decan-6-one: a cyclohexanone with a spiro cyclopentane at C-2 (d).
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