Chemistry - Halogen Derivative Question with Solution | TestHub

Bromination of alkanes proceeds via a free radical mechanism and is highly selective. The relative reactivity of primary, secondary, and tertiary hydrogens towards bromination is approximately $1:82:1600$.

The structure of 2-methylpropane is $(C{H}_3{)}_{3}CH$. It contains $9$ primary hydrogens and $1$ tertiary hydrogen.

The relative rate of formation of the primary halide is $9\times 1=9$.

The relative rate of formation of the tertiary halide is $1\times 1600=1600$.

Since the rate of substitution at the tertiary carbon is much higher, the major product is formed by the replacement of the tertiary hydrogen atom.

Thus, the major product is 2-bromo-2-methylpropane.

Answer: 2-Bromo-2-methylpropane