Correct increasing order for the wavelength of absorbtion in the visible region for the complexes of Co 3- is-A- - Co en 3-3- Co NH 36-3- Co H 2 O 6-3-B- - Co H 2 O 6-3- Co en 3-3- Co NH 36-3- - Co H 2 O 6-3- Co NH 36-3- Co en 6-3-D- - Co NH 36-3- Co en 3-3- Co H 2 O 6-3-

The correct option is A [Co(en)_3]^3+, [Co(NH_3)_6]^3+, [Co(H_2O)_6]^3+ nbsp; According to spectrochemical series, strength of ligand decreases on moving fro ...

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Byju's Answer

Standard XII

Chemistry

Isomerism in Coordination Compounds

Correct incre...

Question

Correct increasing order for the wavelength of absorbtion in the visible region for the complexes of $C o^{3 +}$ is:

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

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

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

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

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Solution

The correct option is A $[C o (e n)_{3}]^{3 +}, [C o (N H_{3})_{6}]^{3 +}, [C o (H_{2} O)_{6}]^{3 +}$
$[C o (e n)_{3}]^{3 +}, [C o (N H_{3})_{6}]^{3 +}, [C o (H_{2} O)_{6}]^{3 +} - ------------------------ \to$
According to spectrochemical series, strength of ligand decreases on moving from left to right in the given complexes, as the strength of ligand decreases splitting energy decreases and also energy between $t_{2 g}$ and $e_{g}$ decreases. Hence, the correct order for increasing wavelength of absorbtion in the visible region is $[C o (e n)_{3}]^{3 +}, [C o (N H_{3})_{6}]^{3 +}, [C o (H_{2} O)_{6}]^{3 +}$

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Similar questions

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

C o^{3 +}

is:

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

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 +}

Q. In which of the following octahedral complexes of

C o

(Z = 27) will the magnitude of

Δ_{0}

be the highest?

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Correct increasing order for the wavelength of absorbtion in the visible region for the complexes of Co3+ is:

Correct increasing order for the wavelength of absorbtion in the visible region for the complexes of $C o^{3 +}$ is: