NEW HYPERVALENT ORGANOBISMUTH(III) CHALCOGENIDES

Albert Paul Soran and Cristian Silvestru

“Babes-Bolyai” University, Faculty of Chemistry & Chemical 
Engineering, 11 Arany Janos St., RO-400028 Cluj-Napoca, Romania;
E-mail:  asoran@chem.ubbcluj.ro 

New hypervalent organobismuth(III) chalcogenides were prepared by reacting the mono- or dihaloorganobismuthines and sodium sulfide or potassium hydroxide. Thus the following type of compounds were obtained (RBiS)2, (R2Bi)2S, (RBiO)n and (R2Bi)2O, where R is [2,6-(Me2NCH2)2C6H4]. The monoorganobismuth sulfide is the first known compound of this type. It exhibits a dimeric structure, with a central Bi2S2 core. The attempts to prepare the analogous organobismuth(III) selenides and tellurides either by methatesis reactions or by insertion of the corresponding elemental chalcogen into the bismuth-bismuth bond of dibismuthines (R2BiBiR2), are also reported. The new compounds were characterized by means of mass spectrometry, NMR spectroscopy in solution and single-crystal X-ray diffraction.

[{2,6-(Me2NCH2)2C6H4}BiS]2