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Theoretically the ring monobromination o...

Theoretically the ring monobromination of 4-bromo-1,2-disopropylbenzene could produce ____ isomers .

A

5

B

4

C

3

D

2

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The correct Answer is:
C
The starting compound may be pictured as.

Monobromination in the 3,5 and 6 positions will produce different compounds. The identity of the alkyl groups is not important since ring monobrominated was specified
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