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A reasonable man in Black Rock came upon a plastic container with a purple powder. The label on the bottle indicated [co(ox)3}^4-. he brings it to the lab and asks you to investigate the degree of magnetism. (a) what is the ground state energy term?
Accepted Answer
The complex [Co(ox)3]^4- has a cobalt(II) ion (Co^2+) in a d^7 electronic configuration. The oxalate ligand (ox) is a weak field ligand, which means it will cause a small splitting of the d orbitals. Since the complex is octahedral, the ground state energy term will be determined by the number of unpaired electrons. To find the ground state energy term, we need to use Hund's rules and consider the splitting of the d orbitals. The d^7 configuration will have a high spin state with 3 unpaired electrons. Therefore, the ground state energy term will be ^4T1g.
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