How many chiral stereoisomers can be drawn for 2 - bromo - 3 - chlorobutane ?

Options

A. 2
B. 3
C. 4
D. 5

Answer

C

Explanation

2-bromo-3-chloro-butane has 2 chiral carbon atoms, hence has `2^(2) = 4` optical isomers.
`{:(" "Br" "Cl),(" |"" |"),(CH_(3)-C-C-CH_(3)),(" |"" |"),(" "H" "H):}`