PHYSICAClass 12 Chemistry simulations · Coordination Compounds
Geometrical isomers of complexes
Compare cis and trans [Co(NH₃)₄Cl₂]⁺ and fac and mer [Co(NH₃)₃Cl₃].
What to notice
cis-[Co(NH₃)₄Cl₂]⁺ is violet and trans is green: the same formula, different arrangement and properties.
Key relation
cis: same ligands at 90° ; trans: at 180° ; fac: three on one face ; mer: three around a meridian
Try this
In fac-[Co(NH₃)₃Cl₃], what is the angle between any two Cl ligands?
What you can change
- Isomer: choose cis-[Co(NH₃)₄Cl₂]⁺, trans-[Co(NH₃)₄Cl₂]⁺, fac-[Co(NH₃)₃Cl₃], mer-[Co(NH₃)₃Cl₃]
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