[Co(NH_3)_6]^{3+} and [CoF_6]^{3-} are respec | vedclass

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(B) For $[Co(NH_3)_6]^{3+}$: The central metal ion is $Co^{3+}$ ($3d^6$ configuration). $NH_3$ is a strong field ligand,which causes pairing of electr

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Spin paired Complex,Spin free Complex

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(B) For $[Co(NH_3)_6]^{3+}$: The central metal ion is $Co^{3+}$ ($3d^6$ configuration). $NH_3$ is a strong field ligand,which causes pairing of electrons in the $d$-orbitals. This results in a $d^2sp^3$ hybridization,forming an inner orbital complex (spin-paired complex).For $[CoF_6]^{3-}$: The central metal ion is $Co^{3+}$ ($3d^6$ configuration). $F^-$ is a weak field ligand,which does not cause pairing of electrons. This results in an $sp^3d^2$ hybridization,forming an outer orbital complex (spin-free complex).Therefore,the correct sequence is spin-paired complex and spin-free complex.

$[Co(NH_3)_6]^{3+}$ and $[CoF_6]^{3-}$ are respectively known as:

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