What typs of hybridisation is possible in square planar molecules?

Options

A. `sp^(3)d`
B. `dsp^(3)`
C. `dsp^(2)`
D. `sp^(3)d^(2).`

Answer

To determine the types of hybridization possible in square planar molecules, we can analyze the options provided and their corresponding geometries.

### Step-by-Step Solution:

1. **Understanding Square Planar Geometry**:
- Square planar molecules have a specific arrangement where four atoms are positioned at the corners of a square, and one atom is located at the center. This geometry is typically seen in molecules with a central atom that has a coordination number of 4 and involves d orbitals.

2. **Analyzing Hybridization Options**:
- **Option 1: sp³d Hybridization**:
- This hybridization involves one s orbital, three p orbitals, and one d orbital. The geometry associated with sp³d hybridization is trigonal bipyramidal, not square planar. Therefore, this option is not correct.

- **Option 2: dsp³ Hybridization**:
- This hybridization involves one d orbital, one s orbital, and three p orbitals. The geometry associated with dsp³ hybridization is square pyramidal, which is also not square planar. Thus, this option is incorrect.

- **Option 3: dsp² Hybridization**:
- This hybridization involves one d orbital, one s orbital, and two p orbitals. The geometry associated with dsp² hybridization is square planar. The d orbital used is typically the dx²-y² orbital. Therefore, this option is correct for square planar molecules.

- **Option 4: sp³d² Hybridization**:
- This hybridization involves one s orbital, three p orbitals, and two d orbitals. The geometry associated with sp³d² hybridization is octahedral, which does not correspond to square planar geometry. Hence, this option is not correct.

3. **Conclusion**:
- The only hybridization that corresponds to square planar geometry is **dsp² hybridization**.

### Final Answer:
The type of hybridization possible in square planar molecules is **dsp² hybridization**.

---