- **Geometrical Isomerism in Coordination Compounds**
Geometrical isomerism arises in coordination compounds when two or more ligands are attached to a metal ion in such a way that the spatial arrangement of atoms differs. This can result in different isomeric forms.
- **Cr(NH3)3Cl3 Structure**
In the case of Cr(NH3)3Cl3, the chromium ion is surrounded by three ammine (NH3) ligands and three chloride (Cl) ions. The possible geometrical isomers can be determined by examining the possible arrangements of ligands around the central chromium ion.
- **Possible Geometrical Isomers**
There are two possible geometrical isomers for Cr(NH3)3Cl3:
1. **Facial Isomer**: In this isomer, all three ammine ligands are located adjacent to each other on one face of the chromium ion, while all three chloride ligands are on the opposite face.
2. **Meridional Isomer**: In this isomer, one ammine ligand, one chloride ligand, and one vacant coordination site are located in a plane passing through the central chromium ion.
- **Conclusion**
The number of possible geometrical isomers for Cr(NH3)3Cl3 is 2, as there are two distinct spatial arrangements of ligands around the central chromium ion. These isomers can exhibit different physical and chemical properties due to their unique structures.