Amongst FeCl₃·3H₂O, K₃[Fe(CN)₆] and [Co(NH₃)₆]Cl₃, the spin-only magnetic moment value of the inner-orbital complex that absorbs light at shortest wavelength is B.M. (nearest integer)

Question

Amongst FeCl₃·3H₂O, K₃[Fe(CN)₆] and [Co(NH₃)₆]Cl₃, the spin-only magnetic moment value of the inner-orbital complex that absorbs light at shortest wavelength is  B.M. (nearest integer)

Canvas Classes · Accepted Answer

Strategy:
 Identify which of the complexes is inner-orbital and absorbs at the shortest wavelength (has the highest crystal field splitting ), then find its magnetic moment based on the key.

Step 1: Identify the inner-orbital complexes
-  is , out-orbital (weak fields).
-  is , inner-orbital ().
-  is inner-orbital ().

Step 2: Find the shortest wavelength (strongest field)
Between  and , practically  is stronger, but  creates a huge splitting. The answer key marks 0 BM, implying the intended c

More questions from Coordination Compounds