Coordination Chemistry Solutions: #9

9.* (1996 2 3) Using only ethylene diamine (en = H₂NCH₂CH₂NH₂) and bromide anions as ligands construct a cationic octahedral complex of cobalt (III); your complex cation should have charge +1 and it should be chiral. Draw a three dimensional structure for this coordination complex below on the left. Then draw the structure of a diastereoisomer on the right.

The chiral cation and its diastereomer are shown below. The diastereomer is not optically active because it has an internal mirror plane, S₁= s.