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1. metal to ligand charge transfer transition

2. ligand to metal charge transfer transition

3. spin allowed and Laporte forbidden d-d transition

4. spin allowed and Laporte allowed d-d transition

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13y ago

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The blue color of [CoCl4]2- is due to its absorption of light in the visible region, particularly in the red end of the spectrum. As a result, the transmitted light appears blue to our eyes. This color is a result of the electronic transitions in the complex caused by the splitting of the d-orbitals in the presence of the chloride ligands.

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11mo ago
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Q: Why CoCl4 -2 shows blue colour?
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