A-LevelChemistryHalogen derivativesMay/June 2012Paper 1 Q251 Mark
When phenacyl chloride, C6H5COCH2Cl, is reacted with aqueous NaOH, the substitution reaction follows an SN2 mechanism. Which structure represents a species formed during the reaction?
A[Transition state structure showing partial positive charge on central carbon]
B[Transition state structure showing partial positive charge on central carbon with OH, Cl and H atoms]
C[Transition state structure showing HO---CH2---Cl with partial negative charges on HO and Cl]
D[Transition state structure showing HOC---CH2---Cl with O and Cl having partial negative charges]
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of halogen derivatives within the Chemistrysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🔒
Unlock the Examiner's Answer
Sign up for free to reveal the correct answer, the official mark scheme breakdown, and the examiner trap analysis for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep