Question

How many constitutional isomers of $C_7{H}_{15}Cl$ will form in the radical chain cholorination of 2,4- dimethylpentane?

• A. $7$
• B. $6$
• C. $5$
• D. $3$

Answer 1

The correct option is D $3$

Free radical halogenation of alkanes is a general reaction. The chlorination of $2,4-dimethylpentane$ provides an informative example. This simple alkane contains three types of hydrogen atoms, $12primary$, $2secondary$ and $2tertiary$.chlorination of this compound produces a mixture of 3 different structures. This product distribution is different than would be expected if the only factor governing the ratio of the two isomers were the ratio of primary secondary and tertiary hydrogens in the starting material.