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

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

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

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

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

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

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

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

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

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

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

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

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Solution

The correct option is A $[C o (C N)_{6}]^{3 -}$ > $[C o (N H_{3})_{6}]^{+ 3}$ , $[C o (H_{2} O)_{6}]^{+ 3}$
$C F S E$ increases when strong field ligand is attached as a result wavelength decreases in case of very strong field ligands like $C N^{-}$ than $N H_{3}$ than $H_{2} O$
so, $λ = [C o (C N)_{6}]^{3 +} < [C o (N H_{3})_{6}]^{3 +} < [C o (H_{2} O)_{6}]^{3 +}$

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

Q. 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 +}

Correct increasing order for the wavelengths of absorption in the visible region for the complexes of $C o^{3 +}$ is

Q. The correct increasing order of wavelengths of absorption in the visible region for the complexes of

C o^{3 +}

is:

Q. Correct increasing order for the wavelength of absorbtion in the visible region for the complexes of

C o^{3 +}

is:

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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?[Co(NH3)6]+3, [Co(CN)6]3−, [Co(H2O)6]+3

The correct option is A [Co(CN)6]3−>[Co(NH3)6]+3,[Co(H2O)6]+3CFSE increases when strong field ligand is attached as a result wavelength decreases in case of very strong field ligands like CN− than NH3 than H2Oso, λ=[Co(CN)6]3+<[Co(NH3)6]3+<[Co(H2O)6]3+

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?
$[C o (N H_{3})_{6}]^{+ 3}$ , $[C o (C N)_{6}]^{3 -}$ , $[C o (H_{2} O)_{6}]^{+ 3}$