Questions candidates found difficult on H3 Chemistry 9813 (Nov 2023) — SN1/SN2 deduction, ΔG° = −RT ln K, yield vs rate, and chair conformations.
Reaction mechanisms — deducing SN1/SN2 from structure and data
Paper 1 Q4 — ΔG° = −RT ln K, and yield ≠ rateThermodynamics vs kinetics — the sign in ΔG° = −RT ln K; equilibrium position vs rate
Paper 1 Q1 — Chair conformation & 1,3-diaxial strainConformational analysis — large groups prefer equatorial to avoid 1,3-diaxial interactions
Original reconstructions inspired by the SEAB/Cambridge Examiner Report. Not actual examination questions.
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