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Article Dans Une Revue Journal of the Chemical Society Dalton Transactions Année : 1984

Synthesis, reactivity, and crystal and molecular structure of tetraphenyldibismuth, Bi2Ph4

Résumé

Tetraphenyldibismuth, Bi2Ph4, is best prepared by the reaction of BiPh2I with 1 equivalent of sodium in liquid ammonia, followed by extraction with toluene and recrystallization from anhydrous ethanol. It is sensitive to air and slightly thermochromic. The crystal and molecular structure was solved by X-ray diffraction methods: triclinic, space group P1 with combining macron], with a= 7.865(4), b= 11.444(5), c= 6.257(3)Å, α= 105.24(4), β= 94.20(7), γ= 96.52(6)°, and Z= 1; R= 0.0560 for 1 097 absorption-corrected reflections having I≥ 3σ(I). The molecule has a staggered trans conformation, with a bismuth–bismuth distance of 2.990(2)Å. Tetraphenyldibismuth reacts promptly with di-iodine to give BiPh2I, and with p-benzoquinone, elemental sulphur, and diazomethane to give the corresponding products of bismuth(III) resulting from oxidative insertion into the bismuth–bismuth bond.
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hal-03545418 , version 1 (27-01-2022)

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Fausto Calderazzo, Rinaldo Poli, Giancarlo Pelizzi. Synthesis, reactivity, and crystal and molecular structure of tetraphenyldibismuth, Bi2Ph4. Journal of the Chemical Society Dalton Transactions, 1984, 11, pp.2365-2369. ⟨10.1039/DT9840002365⟩. ⟨hal-03545418⟩
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