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Stereochemistry Practice Problems

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By — McGraw-Hill Professional
Updated on Aug 16, 2011

Review the following concepts if needed:

Stereochemistry Practice Problems

Practice

For the following compounds, draw projection formulas for all stereoisomers and point out their R,S specifications, optical activity (where present), and meso compounds:

  1. 1,2,3,4-tetrahydroxybutane
  2. 1-chloro-2,3-dibromobutane

Solution

  1. HOCH2CHOHCHOHCH2OH, with two similar chiral C's, has one meso form and two optically active enantiomers.
  2. Solved Problem

  3. ClCH2CHBrCHBrCH3 has two different chiral C's. There are four (22) optically active enantiomers.
  4. Solved Problem

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