In which of the following octahedral complexes of Co (atomic number 27), will the magnitude of $Δ_{o}$ be the highest?

[C o (H_{2} O)_{6}]^{3 +}

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[C o (N H_{3})_{6}]^{3 +}

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[C o (C N)_{6}]^{3 -}

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[C o (C_{2} O_{4})_{3}]^{3 -}

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Solution

The correct option is C $[C o (C N)_{6}]^{3 -}$
$Δ_{0}$ is the magnitude of splitting of d-orbitals in the octahedral field. Strong field ligands cause a large splitting of d-orbitals into $t_{2 g}$ and $e_{g}$ orbitals where $t_{2 g}$ has lower energy than d-orbitals and $e_{g}$ has high energy than d-orbitals.
Spectrochemical series is the series in which ligands are arranged in the order of their increasing splitting ability. The $C N^{-}$ ligands are at the right most end indicating the high splitting power.
Hence option C is correct.

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Similar questions

Q. In which of the following octahedral complexes of

C o

(Z = 27) will the magnitude of

Δ_{0}

be the highest?

The colour of the coordination compounds depends on the crystal field splitting. What will be the correct order of absorption of wavelength of light in the visible region, for the complexes, $[C o (N H_{3})_{6}]^{3 +}, [C o (C N)_{6}]^{3 -}, [C o (H_{2} O)_{6}]^{3 +}$
$[C o (N H_{3})_{6}]^{3 +}, [C o (C N)_{6}]^{3 -}, [C o (H_{2} O)_{6}]^{3 +}$
(a) $[C o (C N)_{6}]^{3 -} > [C o (N H_{3})_{6}]^{3 +} > [C o (H_{2} O)_{6}]^{3 +}$
(b) $[C o (N H_{3})_{6}]^{3 +} > [C o (H_{2} O)_{6}]^{3 +} > [C o (N H_{3})_{6}]^{3 +}$
(c) $[C o (H_{2} O)_{6}]^{3 +} > [C o (N H_{3})_{6}]^{3 +} > [C o (C N)_{6}]^{3 -}$
(d) $[C o (C N)_{6}]^{3 -} > [C o (N H_{3})_{6}]^{3 +} > [C o (H_{2} O)_{6}]^{3 +}$

In which of the following octahedral complexes of cobalt (atomic number 27) will the magnitude of $Δ_{0}$ be the highest?

Q. In which of the following octahedral complexes of

C o

(Z = 27) will the magnitude of

Δ_{0}

be the highest?

Q. In which of the following coordination entities the magnitude of

Δ_{o}

(CFSE in octahedral feild ) will be maximum? (Atomic number of

C o = 27

)

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In which of the following octahedral complexes of Co (atomic number 27), will the magnitude of Δo be the highest?

In which of the following octahedral complexes of Co (atomic number 27), will the magnitude of $Δ_{o}$ be the highest?