The diagram shows ideal octahedral d-level occupancies for two d⁶ ions P and Q. Each small box is one orbital; $t_{2 g}$ is below $e_{g}$ . Which assignments are INCORRECT? Use spin-only magnetism and elementary inner/outer-orbital VBT.

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P is t 2 g ​ ⁴ e g ​ ²: one pair and four unpaired electrons. All five d orbitals are occupied, so it cannot provide two vacant inner d orbitals. Q is t 2 g ​ ⁶ with three pairs, zero unpaired electrons, and two vacant e g ​ orbitals in the VBT bookkeeping. Its orbital CFSE is −2.4Δₒ, but its total pairing term is 3Pₚₐᵢᵣ; zero would incorrectly omit the cost of three pairs. A and B are correctly matched.

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