Question

An alkane $C_6{H}_{14}$ gives two monochloro derivatives when chlorinated. Which of the following is that alkane?

• A. 2,2-dimethyl butane
• B. 3-methyl pentane
• C. 2-methyl pentane
• D. 2,3-dimethyl butane

Answer 1

The correct option is D 2,3-dimethyl butane

During chlorination, one hydrogen is replaced by chlorine atom to give monochloro derivatives. For hexane undergoing monochlorination, 2 monochloro derivatives are formed. So there must be two different kind of hydrogen atoms for two monochloro derivatives to form.

For 2,3-dimethyl butane, there are 2 tertiary and 12 primary hydrogen atoms.

So 2,3-dimethyl butane can form two monochloro derivatives.