In which one of the following, $d - d$ transition involves absorption in the ultraviolet region?

[C u (H_{2} O)_{4}]^{2 +}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

[T i (H_{2} O)_{6}]^{3 +}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

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

No worries! We‘ve got your back. Try BYJU‘S free classes today!

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

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

[C o (N H)_{5}]^{2 +}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is D $[C o (C N)_{6}]^{3 -}$
The wavelength of light absorbed by $[C o (C N)_{6}]^{3 -}$ is around 300 nm which corresponds to the UV region and not in the visible region. This is because $C N^{-}$ is a very strong ligand.

Suggest Corrections

Similar questions

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 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

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?

Join BYJU'S Learning Program

In which one of the following, d−d transition involves absorption in the ultraviolet region?

The correct option is D [Co(CN)6]3−The wavelength of light absorbed by [Co(CN)6]3− is around 300 nm which corresponds to the UV region and not in the visible region. This is because CN− is a very strong ligand.

In which one of the following, $d - d$ transition involves absorption in the ultraviolet region?

The correct option is D $[C o (C N)_{6}]^{3 -}$
The wavelength of light absorbed by $[C o (C N)_{6}]^{3 -}$ is around 300 nm which corresponds to the UV region and not in the visible region. This is because $C N^{-}$ is a very strong ligand.