Chemistry - Coordination Chemistry Question with Solution | TestHub

For octahedral splitting:

Each electron in t₂g is stabilized by $-0.4{\Delta }_o$.

Each electron in eᵍ is destabilized by $+0.6{\Delta }_o$.

Given configuration:

t₂g⁶eᵍ²

Net stabilized electrons = (electrons in t₂g) - (equivalent destabilization of electrons in eᵍ)

$6(0.4)-2(0.6)=2.4-1.2=1.2{\Delta }_o$

Since $1.2{\Delta }_o=3\times 0.4{\Delta }_o$,

the net stabilization is equivalent to 3 electrons in t₂g.

Answer: D (3).