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• 1 media/kisscc0-atomic-orbital-computer-icons-chemistry-orbitals-5b7136eca13a03.6431040415341462846604.png 2020-02-01T13:09:01-08:00 Lecture 4: Molecular Orbitals and Aromaticity 6 image_header 2020-02-06T19:04:36-08:00 Objectives and Skills
  
  KEY INFORMATION SUMMARY
  
  
  HERE you can find extra resources to help you with this lecture!
  
  PROBLEMS
  
  Problem 4.1: Benzene Properties
  1. Explain why we cannot use two Kekulé structures (alternating single-double C-C bonds of different lengths) to show benzene resonance. SOLUTION
  2. Draw the proper resonance structures for benzene. 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 4.2: Aromaticity
  
  Assign the classification of aromatic, anti-aromatic, or non-aromatic to each of the structures below using Hückel’s Rule and check your classifications using the polygon method for p-system MO. 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 4.3: Polycyclics and Ring Shapes
  
  Pentalene is unstable, even at -100°C, whereas heptalene can be made and is shown to react like a acyclic alkene. Explain the difference. 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​​​​​​​ ;)