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Organic Chemistry

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Organic Chemistry

  1. 1. Organic Chemistry Common Mistakes
  2. 2. Organic ChemistryIdentify chiral carbons (Optical Isomers)Tip 1: Ignore Cs in double bonds- they have only 3 neighboursTip 2: Ignore “V-shaped Cs”- they are bonded to 2H (same groups)
  3. 3. Organic ChemistryIdentify chiral carbons (Optical Isomers)Tip 3: Look for Cs that look like:Tip 4: Draw displayed formula if required.
  4. 4. Organic ChemistryDraw Optical IsomersError 1: C* not bonded to C
  5. 5. Organic ChemistryDraw Optical IsomersError 2: Reflecting groups i.e. H3CH2CH2C–
  6. 6. Organic ChemistryWriting Free Radical MechanismError 1: Wrong arrows
  7. 7. Organic ChemistryWriting Free Radical MechanismError 2: Forget to put “UV light”
  8. 8. Organic ChemistryWriting Free Radical MechanismError 3: Use of molecular formulae.
  9. 9. Organic ChemistryWriting Free Radical MechanismError 4: Wrong halogen.Under exam conditions, students sometimes usethe wrong halogen (i.e. use Cl2 when qns asks forBr2)
  10. 10. Organic ChemistryWriting Free Radical MechanismError 4: Wrong halogen.Under exam conditions, students sometimes usethe wrong halogen (i.e. use Cl2 when qns asks forBr2)

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