Bromination of an alkene by N-bromosuccinimide (NBS) in the presence of light or peroxide is a…
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Question “Bromination of an alkene by N-bromosuccinimide (NBS) in the presence of light or peroxide is a…”
Bromination of an alkene by N-bromosuccinimide (NBS) in the
presence of light or peroxide is a radical reaction and produces an
allylic bromide. For the following bromination of
3-methylcyclopentene, select the allylic bromides from the set at
the right that would be products of the reaction.
Answer
This problem is based upon the idea of allylic bromination.
Alkenes can undergo allylic bromination when they react with N-Bromosuccinimide under light.
The allylic carbon is the carbon that lies adjacent to the double bonds. These carbons are subject to allylic halogenations by free radical mechanism.
The given molecule has 2 allylic carbons. Therefore, more than one product can be formed.
Below are the reactions to the first radical position.
Below are the reactions to the first radical position.