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In the following coordination compounds,
1. [Fe(NH3)6]2+
2. [Ni(CN)4]2-
the electrons dont get paired even in the presence of a strong ligand.Why is it so?
Dear student,
When the geometry and the metal are held constant, the splitting of the d orbitals decreases in the following order.
Ligands that give rise to large differences between the energies of the t2g and eg orbitals are called strong-field ligands. Those at the opposite extreme are known as weak-field ligands.
Because they result from studies of the absorption spectra of transition-metal complexes, these generalizations are known as the spectrochemical series. The range of values of for a given geometry is remarkably large. The value of o is 100 kJ/mol in the Ni(H2O)62+ ion, for example, and 520 kJ/mol in the Rh(CN)63- ion.
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