`d^(2) sp^(3)` hybridisation of the central atom gives the ______orbital complex while `sp^(3) d^(2)` hybridisation gives the_________orbital complex .

Answer

To solve the question regarding the hybridization of the central atom and the type of orbital complex formed, we will analyze the two types of hybridization mentioned: \(d^2sp^3\) and \(sp^3d^2\).

### Step 1: Understanding \(d^2sp^3\) Hybridization
- In \(d^2sp^3\) hybridization, the d orbitals involved are from the (n-1) shell, while the s and p orbitals are from the n shell.
- For example, if we consider the central atom in the 4th period, the involved orbitals would be 3d (from the n-1 shell), 4s, and 4p (from the n shell).
- This type of hybridization leads to the formation of an **inner orbital complex**.

### Step 2: Understanding \(sp^3d^2\) Hybridization
- In \(sp^3d^2\) hybridization, all the orbitals (s, p, and d) are from the same shell, which is the n shell.
- Using the same example of the 4th period, the involved orbitals would be 4s, 4p, and 4d.
- This hybridization results in the formation of an **outer orbital complex**.

### Conclusion
- Therefore, the answer to the question is:
- \(d^2sp^3\) hybridization of the central atom gives the **inner orbital complex** while \(sp^3d^2\) hybridization gives the **outer orbital complex**.