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• 1 media/section 2 key image.png 2020-02-17T14:32:16-08:00 Lecture 7: Stereochemistry II 7 image_header 2020-08-28T08:13:19-07:00 Objectives and Skills
  
  KEY INFORMATION SUMMARY
  
  
  
  PROBLEMS
  
  Problem 7.1: Optical Rotation and Polarimetry
  1. Which of the following compounds are optically active? SOLUTION
  2. Describe how polarimetry can distinguish between enantiomers. SOLUTION
  If you made some mistakes or want to practice more, review the concepts that gave you trouble and work on this extra problem. If you're good, move to the problem below ;)
  
  Problem 7.2: Mixtures of Enantiomers
  1. A student is developing a new method form synthesizing ibuprofen. The following ee values were obtained from three trials: 40, 68, 84 (in favour of the active, “S” enantiomer). Determine the molar ratios of S:R for each trial. SOLUTION
  2. A second student was working on an alternative method and achieved an ee value of zero. Which student is having the better success at synthesizing more of the active “S” enantiomer? SOLUTION
  
  If you made some mistakes or want to practice more, review the concepts that gave you trouble and work on this extra problem. If you're good, move to the problem below ;)
  
  Problem 7.3: Multiple Chiral Centers
  1. Determine the total number of stereoisomers for each structure below. SOLUTION
  2. Select one stereoisomer (of those possible), for each structure, and change the configuration around one stereocenter, what would be the relationship between the two stereoisomers? SOLUTION
  If you made some mistakes or want to practice more, review the concepts that gave you trouble and work on this extra problem. If you're good, move to the problem below ;)
  
  Problem 7.4: Meso and Diastereomers
  
  Draw the remaining possible stereoisomers for each compound below, identify the chiral centers, classify the following compounds as chiral or meso and identify the relationship between each possible pair for each compound. SOLUTION
  If you made some mistakes or want to practice more, review the concepts that gave you trouble and work on this extra problem. If you're good, move to the next lecture ;)