In d4 coordination entities, what determines whether the fourth electron enters an eg orbital or a t2g orbital?

Question

In d4 coordination entities, what determines whether the fourth electron enters an eg orbital or a t2g orbital?, The ligand's field strength, The metal ion's charge, The number of ligands, The metal's position in the periodic table

MARKS App · Accepted Answer

Whether the fourth electron in a d4 coordination entity enters an eg orbital or a t 2 g orbital depends on the relative magnitude of the crystal field splitting (Do) and the pairing energy (P), which is influenced by the ligand's field strength.

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