1. Find the point group for the following: a) SF6 b) SeF4 c) pentacyanonitrosylferrate(III).
2. Find the LFSE (in terms of Dq and P) and the spin-only magnetic moment for the following: a) hexacyanoferrate(II) ion; b) diaquadichlorocobalt(II); c) hexaamminechromium(III) ion.
3. Which of the following complexes will be stable by the EAN rule: a) tetracarbonylnickel(0); b) bis(η1-cyclopentadienyl)bis(η5-cyclopentadienyl)titanium(IV); c) trichloro-η2-etheneplatinate(II) ion. Explain your reasoning.
4. Which of the following complexes will be Jahn-Teller active: a) dichloroargentate(I) ion; b) hexaaquamanganese(III) ion c) hexanitritovanadate(III) ion. For those complexes that are Jahn-Teller active, predict the nature of the distortion.
5. Explain why four coordinate Cu2+ complexes are never found with pure tetrahedral geometry.