Write the $IUPAC$ names of the products obtained by the addition reaction of $HBr$ to $hex-1-ene$:
$(i)$ in the absence of peroxide and
$(ii)$ in the presence of peroxide.

(A) $(i)$ In the absence of peroxide,the reaction follows $Markownikoff's$ rule. The addition of $HBr$ to $hex-1-ene$ $(CH_2=CH-CH_2-CH_2-CH_2-CH_3)$ yields $2-bromohexane$ $(CH_3-CH(Br)-CH_2-CH_2-CH_2-CH_3)$.
$(ii)$ In the presence of peroxide,the reaction follows the $Anti-Markownikoff$ rule (peroxide effect or $Kharasch$ effect). The addition of $HBr$ to $hex-1-ene$ yields $1-bromohexane$ $(CH_2(Br)-CH_2-CH_2-CH_2-CH_2-CH_3)$.