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Question

How many stereoisomers does this molecule have? CH3CH=CHCH2CHBrCH3

A
8
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B
2
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C
4
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D
6
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Solution

The correct option is B 4
Given compound, CH3CH=CHCH2CHBrCH3

Both geometrical isomerism (cis and trans-form) and optical isomerism are possible in this compound.

Number of optical isomerism =2n=21=1
Therefore total isomerism i.e. sterioisomers

2(cis/trans)+2(optical)=4

2+2=4
Isomers for this structure.

Hence, the correct option is C

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