Question:
In which one of the following, d-d transition involves absorption in the ultraviolet region
In which one of the following, d-d transition involves absorption in the ultraviolet region
Updated On: Jun 7, 2024
- $[Cu(H_2O)_4]^{2+}$
- $[Ti(H_2O)_6]^{3+}$
- $[Co(NH_3)_6]^{3+}$
- $[Co(CN)_6]^{3-}$
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The Correct Option is D
Approach Solution - 1
The wavelength of light absorbed by $\left[ Co ( CN )_{6}\right]^{3-}$ is $310\, nm$ which corresponds to the UV region and not in the visible region.
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Approach Solution -2
The correct response is (D)
Since \([Co(CN)_6]^{3-}\)absorbs light at a wavelength of around 300 nm, which falls in the UV rather than the visible spectrum. This is due to \(CN^-\) potent ligand properties.
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Concepts Used:
Properties of D Block Elements
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