question_answer

Which of the following complex ions has electrons that are symmetrically filled in both \[{{t}_{2g}}\] and \[{{e}_{g}}\] orbitals?

A) \[{{[Fe{{F}_{6}}]}^{3-}}\]                  

B) \[{{[Mn{{(CN)}_{6}}]}^{4-}}\]

C) \[{{\left[ Co{{F}_{6}} \right]}^{3-}}\]               

D) \[{{[Co{{(N{{H}_{3}})}_{6}}]}^{2+}}\]

Correct Answer: A

Solution :

[a] Symmetrically filled \[{{t}_{2g}}\] and \[{{e}_{g}}\] are those, which contain equal distribution of electrons.

\[{{[Fe{{F}_{6}}]}^{3-}}\]		\[\left\{ \begin{align}   & equal\,distribution\,of \\  & electrons\,in\,orbitals \\  & {{t}_{2g}}\,and\,\,{{e}_{g}} \\ \end{align} \right\}\]
\[{{[Mn{{(CN)}_{6}}]}^{4-}}\]		Unequal distribution of electrons in orbitals
\[{{[Co{{F}_{6}}]}^{3-}}\]		Unequal distribution of electrons
\[{{[Co{{(N{{H}_{3}})}_{6}}]}^{2+}}\]		Unequal distribution of electrons in orbitals