QJEEM24Ch9467: JEE Main 2024 Chemistry - Class 12 JEEM24Ch9467 Solution: and are respectively known as :

Question

Verified Solution • 2025–26 Session moderate

\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}

and

\left[\mathrm{CoF}_6\right]^{3-}

are respectively known as :

Accepted Answer

{[Co {({NH}_{3})}_{6}]}^{3 +}

\mathrm{Co}^{3+}(

strong field ligand

) \Rightarrow 3 \mathrm{~d}^6\left(\mathrm{t}_{2 \mathrm{~g}}^6, \mathrm{e}_{\mathrm{g}}^0\right)

,

Hybridisation :

\mathrm{d}^2 \mathrm{sp}^3

Inner obital complex(spin paired complex)

Pairing will take place.

{[{CoF}_{6}]}^{3 -}

\mathrm{Co}^{3+}(

weak field ligand

) \Rightarrow 3 \mathrm{~d}^6\left(\mathrm{t}_{2 \mathrm{~g}}^4, \mathrm{e}_{\mathrm{g}}^2\right)

Hybridisation :

\mathrm{sp}^3 \mathrm{~d}^2

Outer orbital complex (spin free complex)

No pairing will take place

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