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04-BS-12: May 2017

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 Acidity — Ether vs. Alcohol; Doubly-Allylic vs. Ordinary C–H
  2. Question 2 Nonionic (Neutral) Surfactants — How They Clean Without a Charge
  3. Question 3 Penicillin G — Why the β-Lactam Amide Is the Reactive One
  4. Question 4 Amygdalin & Mandelic Acid — Stereocentres, Enantiomers, Optical Rotation
  5. Question 5 Propranolol — Two Successive Nucleophilic Substitutions
  6. Question 6 Intramolecular vs. Intermolecular Esterification — Why K eq Differs
  7. Question 7 Mechanisms (S N 1 Solvolysis; Exhaustive Methylation) & a Slow-Reacting Hexachlorocyclohexane
  8. Question 8 Halohydrin → Epoxide Ring Closure — Conformational Control
  9. Question 9 Matching Six Compounds to Their IR Spectra
  10. Question 10 Identifying Two Esters from Formula + 1 H NMR
  11. Question 11 Vitamin C — Ascorbate Radical and Why That H Is So Easily Removed
  12. Question 12 Seven Multi-Step Syntheses from Benzene
  13. Question 13 Identifying the Four Monomers of a Poly(ester amide)

Start with Question 1 →

National Exam 04-BS-12, Organic Chemistry — May 2017. 3 hours, closed-book examination (no textbook aid beyond one double-sided aid sheet); a Casio or Sharp approved calculator is permitted. The paper prints thirteen questions using plain "Question N:" numbering; all thirteen are answered in full below.

Reference texts: McMurry, Organic Chemistry, 9th ed. (functional-group reactivity, amide/β-lactam resonance, stereochemistry and specific rotation, SN1/SN2 and epoxide-opening regiochemistry, cyclohexane conformational analysis, IR/NMR spectroscopy, electrophilic aromatic substitution and multi-step synthesis design, polymer/step-growth chemistry); Atkins, Physical Chemistry, 11th ed. (entropy of intramolecular vs. intermolecular reactions).