How many stereoisomers does the molecules have? $\mathrm{CH}_3 \mathrm{CH}=\mathrm{CHCH}_2 \mathrm{CHBrCH}_3$
How many stereoisomers does the molecules have? $\mathrm{CH}_3 \mathrm{CH}=\mathrm{CHCH}_2 \mathrm{CHBrCH}_3$
2
4
6
8
Solution
\(C^{\bullet}=\) asymmetric carbon
Number of optical isomers \(=2^n\)
where, \(\mathrm{n}=\) number of asymmetric carbon atoms
\(2^1=2\)
Number of geometrical isomers \(=2^n\) where, \(\mathrm{n}=\) number of double bonds \(=2^1=2\)
Hence, total number of stereoisomers = Total
optical isomers 4- Total geometrical isomers
\(=2+2=4\)
