114 CHEMISTRY SUMMER 2007 Dr. George A. Papadantonakis Worksheet Week 7, Part II 1. For the following give the oxidation number of the metal, the number of d electrons, the metal orbitals thatb are hybridized, the type of hybridization and the molecular geometry. a) [Cr(H2O)6]2+ (high spin) b) [AuCl2] c) [Co(NH3)6]3+ (low spin) d) [Pd(NH3)3]3+ (low spin) e) [HgI3]f) [CuCl4]22. Why is [Zn(H2O)6]3+ colorless? 3. How many electrons are in the metal coordination sphere from both the metal and donor ligands in a) [Co(CO)4]-` b) [Fe(CO)5], [Mn(CO)6]+ c) ? What trend does this indicate?
4. Why do all octahedral complexes of vanadium(III) have the same number of unpaired electrons irrespective of the matter of the ligand?
5. Why is [Co(CN)6]3+ especially stable? 6. For large crystal field splittings why are d8 configuration complexes often square planar rather than tetrahedral or octahedral?
7. In determining the composition of a unit cell, what fraction of the atom contributes from atoms situated a) on a corner, b) on a face, c) in the center, or d) on an edge.
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