IB skill practice

Explain nucleophilic substitution mechanisms

Paper 1, Paper 2 5 marks Difficulty 4

Classify nucleophilic substitution mechanism

A tertiary halogenoalkane in a Melbourne organic chemistry tutorial reacts with hydroxide in a polar protic solvent. Identify the more likely substitution mechanism. Use the labelled mechanism, pathway, data table, or method diagram before answering. Enter the answer and choose the interpretation that matches the HL chemistry evidence.

Worked practice: chemistry evidence and answer

Use the chemical evidence first, then enter the result and interpretation that match it.