Q51 · CSIR NET Chemistry, June 2017

Paper: CSIR NET June 2017 · Subject: Organic Chemistry · Chapter: Photochemical Reactions · Topic: Photocycloaddition · Marks: 2 · Difficulty: Medium

The major product formed in the following reaction is: Question structure 1 of 2, ABC26OR1080 Question structure 2 of 2, ABC26OR1080 reflux
(a)Option (a) structure, ABC26OR1080
(b)Option (b) structure, ABC26OR1080
(c)Option (c) structure, ABC26OR1080
(d)Option (d) structure, ABC26OR1080
Answer
Answer: B ✓ checked by 4AB · confidence high
Explanation
NBS/hν brominates benzylic positions by a radical mechanism. With 2 equivalents, one Br goes on each benzylic CH₂ of acenaphthene, giving 1,2-dibromoacenaphthene (b).

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