Q.
How many stereoisomers does this molecule have?
$CH_3CH = CHCH_2CHBrCH_3$
AIPMTAIPMT 2008Haloalkanes and Haloarenes
Solution:
C$^{\bullet}$ = asymmetric carbon
Number of optical isomers = 2$^n$
where, n = number of asymmetric carbon atoms
$ 2^1=2$
Number of geometrical isomers = $2^n$
where, n = number of double bonds = $2^1 = 2$
Hence, total number of stereoisomers = Total
optical isomers 4- Total geometrical isomers
$=2+2=4$
