How many unpaired electrons are there in Ir(Br)₆^4-? (Br^- is a weak-field ligand.) A) 2 B) 4 C) 3 D) 0 E) 1

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Ir in Ir(Br)6^3- has an oxidation state of +3, making its electron configuration [Xe]4f^145d^6. Bromide is a weak-field ligand, so it does not cause significant pairing of the d electrons. Therefore, the electron configuration in the d orbitals remains as t2g^5eg^1, resulting in 3 unpaired electrons.

How Many Unpaired Electrons Are There in Ir(Br)64-? (Br- Is

How Many Unpaired Electrons Are There in Ir(Br)₆^4-? (Br^- Is