Identify all the possible monochloro structural isomers expected to be formed on free radical monochlorination of `(CH_(3))_(2)CHCH_(2)CH_(3)`.

Explanation

In the given compound, there are four sets of different types of hydrogen atoms as shown. The replacement of any one of the equivalent hydrogens of each set will give the following four monochloro derivatives. `overset(1)(C)H_(3)-underset(underset(1)(C)H_(3))underset(|)overset(2)(C)H-overset(3)(C)H_(2)-overset(4)(C)H_(3)`
(i) `underset("1-Chloro-2-methylbutane")(Cloverset(1)(C)H_(2)-underset(CH_(3))underset(|)overset(2)(C)H-overset(3)(C)H_(2)overset(4)(C)H_(3))`
(ii) `underset("2-Chloro-2-methylbutane")(overset(1)(C)H_(3)-underset(CH_(3))underset(|)overset(Cl)overset(|)(""^(2)C)-overset(3)(C)H_(2)overset(4)(C)H_(3))`
(iii) `underset("2-Chloro-3-methylbutane")(CH_(3)-underset(CH_(3))underset(|)overset(3)(C)H-underset(Cl)underset(|)overset(2)(C)H-CH_(3))`
(iv). `underset("1-Chloro-3-methylbutane")(CH_(3)-underset(CH_(3))underset(|)overset(3)(C)H-overset(2)(C)H-overset(1)(C)H_(2)-Cl)`