The number of complexes from the following with no electrons in the t₂ orbital is _______. 

TiCl₄, [MnO₄]^–, [FeO₄]^2–, [FeCl₄ ]^–, [CoCl₄ ] ^2–

Ans. (1)

Sol.

\(\mathrm{TiCl}_4 \Rightarrow \mathrm{Ti}^{+4} \quad \mathrm{e}^0 \mathrm{t}_2^0\)

\(\mathrm{MnO}_4^{-} \Rightarrow \mathrm{Mn}^{+7} \quad \mathrm{e}^0 \mathrm{t}_2^0\)

\(\mathrm{FeO}_4^{2-} \Rightarrow \mathrm{Fe}^{+6} \quad \mathrm{e}^2 \mathrm{t}_2^0\)

\(\mathrm{FeCl}_4^{2-} \Rightarrow \mathrm{Fe}^{+2} \quad \mathrm{e}^3 \mathrm{t}_2^3\)

\(\mathrm{CoCl}_4^{2-} \Rightarrow \mathrm{Co}^{+2} \quad \mathrm{e}^4 \mathrm{t}_2^3\)