Isomers of [Co(NH3)3Cl3]
There are two possible isomers for the complex [Co(NH3)3Cl3], which are geometric isomers.

Geometric Isomers:
- Geometric isomers are a type of isomer where the connectivity of the atoms is the same, but the spatial arrangement is different.
- In the case of [Co(NH3)3Cl3], there are two possible geometric isomers based on the spatial arrangement of the ligands.

Possible Isomers:
1. Facial isomer: In this isomer, all three ammonia ligands are arranged on one face of the octahedral complex, while all three chloride ligands are on the opposite face.
2. Meridional isomer: In this isomer, the ammonia and chloride ligands are arranged in a meridional fashion around the central cobalt atom, with alternating ligands on the same plane.

Explanation:
- These two isomers have different spatial arrangements, leading to different physical and chemical properties.
- The number of isomers is limited to two in this case due to the fixed coordination number of the central cobalt atom (6) and the nature of the ligands present in the complex.
- The arrangement of ligands in an octahedral complex like [Co(NH3)3Cl3] can result in only these two possible isomeric forms.