Question

Which of the following are inner orbital paramagnetic complexes? 

• A. II, III, IV only
• B. I, V
• C. VI, VII only
• D. I, VII only

Hint:

Inner orbital complexes typically form when the metal has a lower oxidation state and uses its inner orbitals for bonding.

Answer 1

The Correct Option is B

- Inner orbital complexes are those where the metal ion undergoes low spin configuration and utilizes the inner orbitals for bonding, often seen in 3d elements with relatively small ligands like \( CN^- \), \( F^- \), etc.
- Complexes like \( [Mn(CN)_6]^{3-} \), and \( [Fe(CN)_6]^{3-} \) are examples of inner orbital paramagnetic complexes.
- Complexes like \( [MnCl_6]^{2-} \) and \( [Co(CO)_4]^- \) are not classified as inner orbital.