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(A) OA of 4 with 1b; path a: 4 (20.8 μmol) and 1b (1.0 equiv.) in 0.5 mL of THF-d8 at 25 °C; path b: 4 (2.08 mmol), 1b (1.1 equiv.) and LiOTf (1.0 equiv.) in 7.0 mL of THF at 25 °C. (B) ORTEP drawing of 8b, with ellipsoids drawn at the 50% probability level. H atoms of 8b are omitted for clarity. Selected bond lengths (Å) and angles (°): Bi1–C1 2.225(2), Bi1–C4 2.294(2), Bi1–N1 2.450(2), Bi1–N2 2.4779(19), N1–C2 1.280(3), N2–C3 1.286(3); C1–Bi1–C4 93.60(8).
