Chalcogen-Bonding Interactions in Telluroether Heterocycles [Te(CH2 )m ]n (n=1-4; m=3-7).

Marko Rodewald|,Tobias Niksch,Helmar Görls,Wolfgang Weigand,J Mikko Rautiainen,Risto S Laitinen,Raija Oilunkaniemi

doi:10.1002/chem.202003453

Abstract

Invited for the cover of this issue are the groups of Risto Laitinen at University of Oulu and Wolfgang Weigand at Friedrich Schiller University Jena. The image depicts a picturesque view of the Te⋅⋅⋅Te close contacts forming infinite tubular shafts in 1,9,17,25-Te4 (CH2 )28 . The cover artwork was designed and created by Marko Rodewald. Read the full text of the article at 10.1002/chem.202002510.

Highlights

Chalcogen bonding, which has recently been formally defined by IUPAC,[1] is a special class of secondary bonding interactions (SBIs), a term that was originally coined by Alcock.[2]
Chalcogen bonds are most prominent for the heavy chalcogen atoms tellurium and selenium and resemble the halogen,[1a,3] pnictogen and tetrel bonds[4,5] of the heavy p-block elements
The preparations were modelled after those of Morgan and co-workers, who have reported the synthesis of Te(CH2)4 from elemental tellurium and I(CH2)4I,[15] and of Te(CH2)5 from Al3Te2 and Br(CH2)5Br.[16]

Summary

Introduction

Chalcogen bonding, which has recently been formally defined by IUPAC,[1] is a special class of secondary bonding interactions (SBIs), a term that was originally coined by Alcock.[2]. The dispersion effects become more significant with increasing period number and play the major role in the interactions between the heaviest pblock elements This contribution is concerned with chalcogen bonds involving tellurium atoms. Macrocyclic unsaturated chalcogenoethers are another class of compounds that can further our understanding of chalcogen bonds These types of compounds have been extensively studied both computationally and experimentally by Gleiter and co-workers.[6a,e–h,10] Due to the chalcogen-bonding interactions, the ring molecules are often packed in a columnar fashion to form tubular lattices. This packing of cyclic species is mimicked by some related acyclic dimethyl polyalkynyl diseleno- and ditelluroethers.[11]. The nature of the molecular packing in the lattices was explored by solid-state DFT (PBE0-D3/pob-TZVP) calculations involving periodic boundary conditions

Results and Discussion

Conclusion

Conflict of interest