Question:
The homoleptic and octahedral complex of Co2+ and H2O has___ set of orbitals. unpaired electron(s) in the t2g set of orbitals.
The homoleptic and octahedral complex of Co2+ and H2O has___ set of orbitals. unpaired electron(s) in the t2g set of orbitals.
Updated On: Feb 20, 2026
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Solution and Explanation
- Homoleptic complexes are those in which the central metal ion is surrounded by only one type of ligand. For this case, the complex is [Co(H2O)6]2+.
- Co2+ has the electronic configuration [Ar]3d7. The ligand H2O is a weak field ligand, meaning it does not cause a significant splitting of the d-orbitals.
- The t2g and eg orbitals are filled based on Hund’s rule of maximum multiplicity: t2g5 eg2.
- This configuration results in one unpaired electron in the t2g orbitals.
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