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What results in coordination complexes having bright colour
Accepted Answer
The bright colors observed in coordination complexes are primarily due to the d-d transitions within the metal ion's d orbitals. These transitions involve the absorption of specific wavelengths of light, leading to the complementary color being observed. The energy difference between the d orbitals is influenced by factors like the nature of the ligands, the oxidation state of the metal ion, and the geometry of the complex, leading to a wide range of colors.
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