Lecture 3: Molecular Orbitals and Resonance
KEY INFORMATION SUMMARY
HERE you can find extra resources to help you with this lecture!
PROBLEMS
Problem 3.1: Resonance Structures
- Determine whether the following pairs of compounds are resonance structures or structural isomers. SOLUTION
- Insert curved arrows to show movement of electrons between those pairs that are resonance structures. 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 3.2: Resonance Contributing Structures
Draw all the possible resonance structures and predict the best contributing one for each of the following species (include curved arrows). 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 3.3: p-Systems
For each of the following species, draw the resonance hybrid and p-orbital view, determine the number of p AOs, p MOs, p-electrons and MOs for the whole molecule. 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 3.4: UV-Vis Spectroscopy
Explain why benzene (C6H6) has a higher lmax than CH2=CH2. 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 ;)