Give the structures of the major organic products from 3-ethyl-2-pentene using (i) HBr in the presence of peroxide and (ii) HCl in the presence of peroxide.

Explanation

i) `CH_3CH_2-overset(C_2H_5)overset(|)(C)=CH-CH_3+HBroverset("Peroxide")(rarr) `
`CH_3CH_2-overset(C_2H_5)overset(|)(C)H-overset(Br)(C)HCH_3`
This is anti -Markovnikoff addition
ii) `CH_3CH_2-overset(C_2H_5)overset(|)(C)=CH-CH_3+HCloverset("Peroxide")(rarr)`
`CH_3CH_2-underset(C)underset(|)overset(C_2H_5)overset(|)(C)-CH_2CH_3`
This is Markovnikoff addition, since peroxide effect is not observed in HCI.