Chemistry 401

Intermediate Inorganic Chemistry

University of Rhode Island

Exam 3

December 5, 2008
open book, open notes

1. For each of the following, draw the structure, determine the point group, find the LFSE (in terms of Dq and P), estimate the magnetic moment in terms of Bohr-Magnetons, predict the stability based on the EAN rule, and indicate if the complex will be Jahn-Teller active. If the complex is Jahn-Teller active, indicate the nature of the distortion.

a. dichloro-η²-etheneplatinum (II).

b. pentachloronitridoosmate(VI) ion.

c. pentacyanonitrosylferrate(III) ion. (Assume all of the ligands are linear with respect to the metal.)


2. A CO ligand can often be removed from carbonyl complexes using light. Explain this observation in terms of molecular orbital theory for an octahedral complex.


3. PF3 has a similar position in the spectrochemical series as CO. Both ligands act similarly: the donate electrons to the metal through a lone pair and accept electrons from metal π orbitals. Explain how PF3 can act as a σ donor and a π acceptor in metal complexes.


4. The compound Rh(H)(CO)(PPh3)3 can be used as a hydroformylation catalyst. Draw the structure and indicate how this compound might act catalytically. (PPh3 = triphenylphosphine).