Darstellung und Charakterisierung tellurhaltiger Chalkogen‐Stickstoff‐Fünfringsysteme — Struktur von [ClTeNSNS + ] 2 [Cl‐][AsF ‐ 6 ]

Preparation and Characterisation of Five‐Membered Tellurium‐Containing Chalcogen‐Nitrogen Ring Systems — Structure of [ClTeNSNS + ] 2 [Cl‐][AsF ‐ 6 ] The reaction of [(Me 3 Si) 2 N] 2 S with TeX 4 /SeCl 4 ‐ or TeX 4 /SCl 2 mixtures leads to the formation of covalent five‐membered and , respectively. Treatment of 2a and 2b with Ag + Y ‐ (Y ‐ = BF ‐ 4 , AsF ‐ 6 , SbF ‐ 6 ) in liquid SO 2 provides the cationic ring systems and 3d–f (X = Br). If the solvent is CH 2 Cl 2 the double salts and 4d–f (X = Br) are obtained. The structure of has been determined by X‐ray crystallography. The selenium‐containing five‐membered ring systems are accessible by reaction of AgAsF 6 with 1a and 1c , respectively.