Polytelluride secondary interactions

Cs3Se22 has recently been prepared under methanolothermal conditions138 and is isostructural to Cs3Te2219. In contrast to the [Te ] sheets (Figure 10b) of the polytelluride, the anionic sheets in Cs3Se22 are best described as [(Se3-)(Se3-)], in which disordered pairs of bent Se3 radical anions and Sef anions are linked through secondary interactions. 

The propensity of tellurium to form intermolecular interactions distinguishes its chemical properties from those of sulfur and selenium for which such secondary bonding is virtually nonexistent (see Ref 38 and references therein). By contrast to polysulfides and polyseleiudes, polytelluride anions can exhibit charges that deviate from -2. 

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