Chalcogena-Nitrogenheterocycles: Preparation, Structures and Reaction Pathways

Abstract

The aim of this presentation is to demonstrate the unexpected properties of bis(sulfinylamino)chaIcogenanes E(NSO)₂, E = S, Se, Te, as synthons for the preparation of chalcogen-nitrogen heterocycles. Their syntheses and structures are described and their chemical properties will be discussed. Under the influence of superacids they proved to be good precursors for the syntheses of new ionic and neutral chalcogen-nitrogen heterocycles and cages. The complicated pathway from e.g. Te(NSO)₂ to the heterocycle Cl₃Sb··Cl··Te(Cl)SN = S = N will be elucidated on the base of postulated intermediates in comparison with heterocycle formation using Se(NSO)₂ as a synthon.

Keywords::

• Sulfinylamino
• Chalcogenanes
• Thiaselenatelluradiazoles
• Thiatelluratetrazocinium
• Tellurium(IV) compounds
• Tellurathiadiazete