How many different monochlorobutanes (including stereoisomers) are formed in the free radical chlorination of butane?

5 monochloro derivative will be yield to when 2 methylbutane react with chlorine. 4 carbon atom are present in 2 methylbutane which react with chlorine. The chiral carbon that is carbon anti bonding react with chlorine to form four different groups around it hence it will stereoisomer