question_answer

Which of the following complex species does not involve inner orbital hybridisation?

A)  \[{{[Co{{F}_{6}}]}^{3-}}\]

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

C)  \[{{[Fe{{(CN)}_{6}}]}^{3-}}\]

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

Correct Answer: A

Solution :

 \[{{[Co{{F}_{6}}]}^{3-}}\]is a outer orbital complex ion. It involves outer orbital hybridisation. It has \[s{{p}^{3}}{{d}^{2}}-\]hybridisation because \[{{F}^{-}}\]is a weak ligand.