# What alkane of molecular C_8H_18 gives a single product of monohalogenation when heated with Cl_2?

Sep 8, 2016

$\text{Hexamethylethane}$

#### Explanation:

${\left({H}_{3} C\right)}_{3} C - C {\left(C {H}_{3}\right)}_{3}$. The parent hydrocarbon contains 2 quaternary carbon centres (which cannot be halogenated because it has no hydrogens to substitute), and 6 methyl centres, all of which are equivalent.

Substitution of any methyl centre gives an identical product.

${\left({H}_{3} C\right)}_{3} C - C {\left(C {H}_{3}\right)}_{3} + {X}_{2} \rightarrow {\left({H}_{3} C\right)}_{3} C - C {\left(C {H}_{3}\right)}_{2} C {H}_{2} X + H X$

How would you name this beast systematically?