Question

The hybridization of metals involved in the following complexes, respectively are:
\[ [Mn(CN)_6]^{3-}, \quad [CoF_6]^{3-} \]

• A. sp\(^3\)d\(^2\), sp\(^3\)d\(^2\)
• B. sp\(^3\)d\(^2\), d\(^2\)sp\(^3\)
• C. d\(^2\)sp\(^3\), d\(^2\)sp\(^3\)
• D. d\(^2\)sp\(^3\), sp\(^3\)d\(^2\)

Hint:

Inner orbital complexes with strong field ligands → d\(^2\)sp\(^3\), outer orbital complexes with weak field ligands → sp\(^3\)d\(^2\).

Answer 1

The Correct Option is D

Step 1: Classify ligands as strong or weak field.
CN\(^-\) is a strong-field ligand -- causes low spin and uses inner d orbitals. F\(^-\) is a weak-field ligand -- causes high spin and uses outer d orbitals.

Step 2: Assign hybridisation.
[Mn(CN)\(_6\)]\(^{3-}\): low spin, inner orbital complex -- d\(^2\)sp\(^3\) (octahedral). [CoF\(_6\)]\(^{3-}\): high spin, outer orbital complex -- sp\(^3\)d\(^2\) (octahedral).
\[ \boxed{d^2sp^3,\ sp^3d^2} \]