Organometallic Borromean Rings and (2) Catenanes Featuring Di‐ NHC Ligands

Abstract: We report herein a series of organometallic Borromean rings (BRs) and [2]catenanes prepared from benzobiscarbene ligands. The reaction of dinickel complexes of the benzobiscarbenes 1 a–1 c with a thiazolothiazole bridged bipyridyl ligand L2 led by self‐assembly to a series of organometallic BRs. Solvophobic effects played a crucial role in the formation and stability of the interlocked species. The stability of BRs is related to the N‐alkyl substituents at the precursors 1 a–1 c, where longer alkyl substitutes improve stability and inter‐ring interactions. Solvophobic effects are also important for the stability of [2]catenanes prepared from 1 a–1 c and a flexible bipyridyl ligand L3. In solution, an equilibrium between the [2]catenanes and their macrocyclic building blocks was observed. High proportions of [2]catenanes were obtained in concentrated solutions or polar solvents. The proportion of [2]catenanes in solution could be further enhanced by lengthening of the N‐alkyl substitutes.

Standort
Deutsche Nationalbibliothek Frankfurt am Main
Umfang
Online-Ressource
Sprache
Englisch

Erschienen in
Organometallic Borromean Rings and (2) Catenanes Featuring Di‐ NHC Ligands ; day:03 ; month:02 ; year:2023 ; extent:8
Angewandte Chemie / International edition. International edition ; (03.02.2023) (gesamt 8)

Urheber
Lu, Ye
Dutschke, Patrick D.
Kinas, Jenny
Hepp, Alexander
Jin, Guo-Xin
Hahn, Franz Ekkehardt

DOI
10.1002/anie.202217681
URN
urn:nbn:de:101:1-2023020414120838043594
Rechteinformation
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Letzte Aktualisierung
14.08.2025, 10:51 MESZ

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