Spectroscopy and Selection Rules

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As move from Cl– → I–, halide more easily oxidized (lower electronegativity). Similarly OsIV is more easily reduced than OsIII, hence for a given ligand, X–, OsX 6 2– will have lower energy LMCTs as compared to OsX6 3–. MLCT transitions promote an electron from metal-based orbital to ligand π* orbital. Mn+—L → M(n-1)+—L

  Rules, Selection, Halides, Selection rules