The correct order of the wavelength of lightabsorbed by the following complexes is,A. [Co(NH3)6]3+ B. [Co(CN)6]3–C. [Cu(H2O)4]2+ D. [Ti(H2O)6]3+Choose the correct answer from the options givenbelow:

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Chemistry

Answer

Crystal Field Splitting Explanation

Crystal Field Splitting (Δ0)

The crystal field splitting energy, Δ0, depends upon:

  • The field produced by the ligand
  • The charge on the metal ion

Ligand Field Strength Order (Increasing Δ0):

H2O < NH3 < CN−

A higher charge on the metal ion leads to greater splitting and a higher Δ0.

Metal Ion Order (Increasing Δ0):

Cu2+ < Ti3+ < Co3+

Relationship Between Absorbed Wavelength and Δ0:

λabsorbed ∝ 1 / Δ0

Sequence of Wavelengths (λ):

B < A < D < C

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