Coordination CompoundMedium
Question
The correct order the wavelength of absorption in the visible region is :
Options
A.[Ni(NO2)6]+ < [Ni(NH3)6]2+ < [Ni(H2O)6]2+
B.[Ni(NO2)6]+ < [Ni(H2O)6]2+ < [Ni(NH3)6]2+
C.[Ni(H2O)6]2+ < [Ni(NH3)6]2+ < [Ni(NO2)6]+
D.[Ni(NH3)6]2+ < [Ni(H2O)6]2+ < [Ni(NO2)6]+
Solution
For any metal cation, the magnitude of ᐃ0 depends upon the nature of ligand. Higher the value of ᐃ0 lower will be the wave lenght absorbed. ᐃ0 is crystal field stabilisation energy.
The value of ᐃ0 for ligands varies as follows
H2O < NH3 < NO2-
So, the wavelength absorbed will vary in reverse order or NO2- < NH3 < H2O
The value of ᐃ0 for ligands varies as follows
H2O < NH3 < NO2-
So, the wavelength absorbed will vary in reverse order or NO2- < NH3 < H2O
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