Synthesis and structural characterisation of the aggregates of benzo-1,2-chalcogenazole 2-oxides

Iodine oxidation of bis[2-(hydroxyiminomethyl)phenyl] dichalcogenides yields benzo-1,2-chalcogenazole 2-oxides. Annulated derivatives of iso-tellurazole N-oxides spontaneously aggregate into cyclic tetra- and hexamers through TeO chalcogen bonding; the structures of the co-crystals with benzene and CH₂Cl₂ illustrate the ability of these macrocycles to interact with small guest molecules. The selenium congener crystallizes forming a …