1. Identify the point group for each of the following: a) CO32–; b) PCl3; c) MnO4–; d) HCN.
2. Name the following transition metal complexes: a) Mo(CO)6; b) Mn(NO)(CN)5; c) Ru(bpy)(CN)4; d) Co(η5-cp)2.
3. The ligand, [2,4-ditert-butyl-6-{[(2-pyridyl)ethyl](2-hydroxybenzyl)-aminomethyl}-phenol when complexed to Co2+, Ni2+, and Cu2+ gives the data shown below. Is the ligand a weak field or strong field? Are the data internally consistent? Explain your reasoning.
Ionλmax (nm) ε (M–1cm–1)μeff (BM)
Co2+750 304.4
Ni2+680 702.9
Cu2+770 4001.3
4. Predict if the following will be Jahn-Teller active. For those that are J-T active, predict whether the distortion will be elongation or compression. a) Mo(CO)6; b) Fe(CN)64–; c) Fe(CN)63–; d) CoF64–.
5. Use the EAN rule to determine if the following are stable or not: a) Mo(CO)6; b) Ni(PF3)4; c) V(CO)6; d) Co(η5-cp)2.