Give reason for the fact that crystal field theory is not applied to complexes of many group metals .

Explanation

### Step-by-Step Solution:

1. **Understanding Crystal Field Theory (CFT)**:
- Crystal Field Theory explains the electronic structure of transition metal complexes by considering the effect of the surrounding ligands on the d-orbitals of the metal ion.
- It is particularly useful for transition metals, which have partially filled d-orbitals.

2. **Identifying Main Group Metals**:
- Main group metals are found in groups 1, 2, and 13 to 18 of the periodic table.
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