CAIE A-Level Chemistry 15.1.2 Primary, Secondary and Tertiary Halogenoalkanes

Practise classifying a halogenoalkane from the number of carbon groups bonded to the carbon bearing the halogen.

Exam points

locate the carbon directly bonded to X before counting any attached carbon atoms
classify one attached carbon as primary, two as secondary and three as tertiary
apply the definition to displayed or skeletal structures rather than using overall chain branching

[Maximum number: 1]

Species such as $\mathrm{NH}_{4}{ }^{+}, \mathrm{CO}_{3}{ }^{2-}$ and $\mathrm{PO}_{4}{ }^{3-}$ are examples of molecular ions.

$\mathrm{OH}^{-}(\mathrm{aq})$ reacts with 2-bromo-2-methylpropane in an $\mathrm{S}_{\mathrm{N}} 1$ reaction. The molecular ion $\left(\mathrm{CH}_{3}\right)_{3} \mathrm{C}^{+}$ forms as the intermediate in this reaction.

2-bromo-2-methylpropane is a tertiary bromoalkane.

Define tertiary bromoalkane.

All question bank results loaded

15.1.2—Classify halogenoalkanes into primary, question 1