Three octahedral complexes of a metal ion M ^ n+ with three different monodentate ligands L ₁ , L ₂ , and L ₃ absorb light at wavelengths 650 nm , 450 nm , and 500 nm respectively. The correct increasing order of the crystal field strength

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Three octahedral complexes of a metal ion M ^ n+ with three different monodentate ligands L ₁ , L ₂ , and L ₃ absorb light at wavelengths 650 nm , 450 nm , and 500 nm respectively. The correct increasing order of the crystal field strength of the ligands is

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Correct answer: A. L ₁ < L ₃ < L ₂

The energy of absorption is inversely proportional to the wavelength of absorbed light ( E = hc ). A stronger ligand produces a larger crystal field splitting ( ₀ ), which corresponds to a higher energy of absorption and consequently a shorter wavelength of absorption. The order of wavelengths of absorption is L ₂ (450 nm) Therefore, the order of absorption energy and ligand field strength is L ₁ Answer: L ₁ < L ₃ < L ₂

Three octahedral complexes of a metal ion M ^ n+ with three different monodentate ligands L ₁ , L ₂ , and L ₃ absorb light at wavelengths 650 nm , 450 nm , and 500 nm respectively. The correct increasing order of the crystal field strength of the ligands is

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