Stereoisomers (Unit 4)

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1. Define a racemic mixture

  • contains only 1 enantiomer of an optically active compound
  • contains equal quantities of each enantiomer of an optically active compound (50/50)
  • contains similar quantites of each enantiomer of an optically active compound
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2. How can you test if a compund is optically active?

  • If they rotate a plane of polarised light
  • If the rotate a plane of light
  • add NaOH
  • cross your fingers and hope

3. Which mechanism produces two type of optical isomer?

  • Electrophilic addition
  • Sn1 Mechanism
  • Nucleophilic addition
  • Sn2 Mechanism

4. How many types of steorisomers are there?

  • 2
  • 19
  • 1
  • 3

5. Why?

  • because thats how chemistry works
  • because planar ion can be attcked by nucleophile from either side
  • because planar ion can only be attacked by nucleophile from one side

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