Why are different colours observed in octahedral and tetrahedral complexes for the same metal and same ligands ?

Why are different colours observed in octahedral and tetrahedral compl

1.	Why are different colours observed in octahedral and tetrahedral complexes for the same metal and same ligands ?
Answer» Extent of spilitting of d-orbitals is different in octahedral and tetrahedral field. CFSE in octahedral and tetra federal field are closely related as. `Delta_(t)=(4/9) Delta_(o)` Where, `Delta_(t) =` crystal field splitting energy in tetrahedral field `Delta_(0) =` crystal field splitting energy in octahedral field Wavelength of light and CFSE are related to each other by fomula `Delta_(0)=E=(hc)/lambda` `E prop 1/lambda` So, higher wavelength of light is absorbed in octahedral complexes than tetrahedral complexes for same metal and ligands. Thus, different colours are observed.

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Why are different colours observed in octahedral and tetrahedral complexes for the same metal and same ligands ?

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