How many total d-orbitals from the central metal ion are utilized in the hybridization of the inner — Coordination Compounds Chemistry Question

💡 Solution & Explanation

The central metal $Cr$ is in a $+3$ oxidation state, yielding a $3d^3$ configuration. The ammine ligand ($NH_3$) pairs with the available inner d-orbitals. VBT utilizes the $(n-1)d$ orbitals for hybridization. Specifically, it undergoes $d^2sp^3$ hybridization. Therefore, exactly $2$ inner $d$ -orbitals are utilized in this hybridization.