**4. Conclusion**

In the majority of structures having tellurium and halogens, intermolecular Te···X contacts are observed.

Despite the great chemical diversity found in these compounds, the majority of them can be grouped considering only a few supramolecular patterns, *i.e.*, dimer, simple chain and chain of 4-membered rings.

Isostructurality is frequent in series of compounds with the same molecular structure but different halogen and, moreover, in some non isostructural compounds the supramolecular arrangement is retained.

No relations have been found between supramolecular arrangements of polymorphs although due to the reduced number of cases can not ruled them out.

## **5. Acknowledgment**

The authors gratefully acknowledge Dr D. Cendón for his valuable participation in the discussion and correction of the text.
