Concept Review Questions Section 1 1. Explain the difference between a microstate and a state. 2. Explain what is meant by a term? Why do we need terms to explain electronic spectra? 3. What is meant by “Russell-Saunders coupling”? 3. What is the definition of the total angular momentum quantum number L? 4. What is the definition of the quantum number M l ? 5. What is the definition of the quantum number m l ? 6. What is definition of the total spin quantum number S? 7. What is the definition of the quantum number M s ? 8. What is the definition of the quantum number m s ? 9. How many microstates are associated with a term defined by a quantum number L and S respectively? 10. Which formula can be used to calculate the number of microstates with a specific d electron configuration? 11. What is meant by the spin-orbit coupling? 12. Why is the spin-orbit coupling usually neglected for electronic spectra? 13. What is the dependency between the quantum number L and the energy of a term? 14. What is the dependency between the quantum number S and the energy of a term? 15. What is meant by a “free ion term”? Section 2 1. How do D, P, and S terms split in an octahedral and tetrahedral ligand field, respectively? 2. What is a correlation diagram? 3. What is meant by t 2g 2 , t 2g e g , and e g 2 terms in octahedral complexes? Explain their relationship to molecular orbitals. 4. What is the major difference between a Tanabe-Sugano diagram and a correlation diagram? 5. Why do terms with the same symmetry never cross in Tanabe-Sugano diagrams? 6. When are lines in Tanabe diagrams straight and when are they bent? 7. What is a metal-to-ligand charge transfer (MLCT) transition? 8. What is a ligand-to-metal charge (LMCT) transfer transition? 9. Under which conditions does a MLCT transition occur in the visible range? Name one example of a complex that does MLCT. 10. Under which conditions does a LMCT transiton occur in the visible range? Name one example of a complex that does LMCT? Dr. Kai Landskron ( Lehigh University ). If you like this textbook, please consider to make a donation to support the author's research at Lehigh University: Click Here to Donate .