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 (1), Se (2), Te
(3)). The structures of 1–3 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).