Solid-State Structures of Bis(diethylbismuthanyl)sulfane, -selenane, and -tellurane

Tetraethyldibismuthine (Bi₂Et₄) reacts with elemental chalcogens with insertion into the Bi–Bi bond and formation of bis­(diethylbismuthanyl)­chalcogenanes ((Et₂Bi)₂E; E = S (<b>1</b>), Se (<b>2</b>), Te (<b>3</b>)). The structures of <b>1</b>–<b>3</b> were determined by single crystal X-ray diffraction. The complexes exclusively adopt syn-anti conformations in the solid state. The molecules show weak intermolecular Bi···chalcogen contacts, resulting in the formation of a three-dimensional network of corner-shared Bi₄E tetrahedra (E = S, Se, Te)