The correct order of A, B, C and D in terms of wavenumber of light absorbed is:
(A)
(B)
(C)
(D)

Question

The correct order of A, B, C and D in terms of wavenumber of light absorbed is:
(A) 
(B) 
(C) 
(D)

Canvas Classes · Accepted Answer

Strategy:
 The wavenumber of absorbed light () is directly proportional to the crystal field splitting energy (). Higher  corresponds to higher wavenumber absorption.  depends on the metal oxidation state and the spectrochemical series of ligands.

Step 1: Evaluate the complexes
- (D) :  (). Weak field ligand . This has the lowest splitting energy.
- (A) :  (mixed ligands). Generally low .
- (C) :  with mostly strong field . The  oxidation state significantly increases  compared to .
- (B) :  wi

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