Evaluating Lewis Structures

Question 1
For the following molecules with the given σ-framework hybridisation, draw an MO Diagram for the π-bonding between Xe and O, assuming that d orbitals are low enough in energy to form bonds and draw a Lewis Structure from the MO Diagram:

1. XeO₃ (C_3v, hybridisation: sp³) [Solution]
2. XeF₂O₃ (D_3h, hybridisation: sp³d) [Solution]

Walsh Diagrams

Question 1
For the following molecules predict which geometry is more stable by constructing a Walsh diagram. Draw pictures of all occupied molecular orbitals (ignore non-bonding electrons on terminal atoms). Which orbital has the largest energy change that dominates the more stable geometry?

1. H₃O⁺: trigonal planar (D_3h) or trigonal pyramidal (C_3v) [Solution]
2. SF₆: octahedral (O_h) or hexagonal planar (D_6h) [Solution]