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(A) Preparation of bismuthinidenes 4 and 5. (B) ORTEP drawing of 4 and 5, with ellipsoids drawn at the 50% probability level. H atoms of 4 and 5 as well as distortions of 4 are omitted for clarity. Ar = m-Tp. Selected bond lengths (Å): for 4, Bi1–C1 2.1487(19), Bi1–N1 2.4601(15), Bi1–N2 2.5066(15), N1–C7 1.301(3), N2–C8 1.300(2); for 5, Bi1–C1 2.1503(18), Bi1–N1 2.4621(15), Bi1–N2 2.4552(16), N1–C7 1.301(2), N2–C9 1.305(2).
