H. Exercises:
7. Contrasting Two Isomers of [Co(H2NCH2CH2NH2)3]3+

Isomer A:

1. Do the ligands have λ or δ configurations?


If it helps:
Now test for C3 and C2 Operations:
2. Is the C3 Operation a Symmetry Operation for this molecule?
To test for a C2 you will need to align the molecule correctly with your mouse.
3. Does this isomer have one or more C2 Rotation Operations?
3. What is the point group for this molecule?
4. What is the configuration of each ligand?
5. Can you designate the metal complex as having a Λ or Δ configuration?
6. What isomer would be the enantiomer of this isomer?

Isomer B

1. Do the ligands have λ or δ configurations?


If it helps:
Now test for C3 and C2 Operations:
2. Is the C3 Operation a Symmetry Operation for this molecule?
To test for a C2 you will need to align the molecule correctly with your mouse.
3. Does this isomer have one or more C2 Rotation Operations?
4. What is the point group for this molecule?
5. Is this molecule chiral?
6. What is the configuration of each ligand and the overall name of the isomer?
7. If this isomer is chiral, what would be the enantiomer of this isomer?
Return to Index

Resources developed by Marion E. Cass, Carleton College and updated in 2014. Computations and content done in consultation with Henry S. Rzepa, Imperial College, London