Chalcogen-Bond-Induced Double Helix Based on Self-Assembly of a Small Planar Building Block.

Autor: Mehrparvar S; Fakultät für Chemie, Universität Duisburg-Essen, Universitätsstr. 7, 45117, Essen, Germany., Wölper C; Fakultät für Chemie, Universität Duisburg-Essen, Universitätsstr. 7, 45117, Essen, Germany., Haberhauer G; Fakultät für Chemie, Universität Duisburg-Essen, Universitätsstr. 7, 45117, Essen, Germany.
Jazyk: angličtina
Zdroj: Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2023 Jul 17; Vol. 62 (29), pp. e202304202. Date of Electronic Publication: 2023 Jun 02.
DOI: 10.1002/anie.202304202
Abstrakt: As a rule, helical structures at the molecular level are formed by non-planar units. This makes the design of helices, starting from planar building blocks via self-assembly, even more fascinating. Until now, however, this has only been achieved in rare cases, where hydrogen and halogen bonds were involved. Here, we show that the carbonyl-tellurium interaction motif is suitable to assemble even small planar units into helical structures in solid phase. We found two different types of helices: both single and double helices, depending on the substitution pattern. In the double helix, the strands are connected by additional Te⋅⋅⋅Te chalcogen bonds. In the case of the single helix, a spontaneous enantiomeric resolution occurs in the crystal. This underlines the potential of the carbonyl-tellurium chalcogen bond to generate complex three-dimensional patterns.
(© 2023 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH.)
Databáze: MEDLINE
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