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Organometallic Borromean Rings and [2]Catenanes Featuring Di‐NHC Ligands.
- Source :
-
Angewandte Chemie International Edition . 3/6/2023, Vol. 62 Issue 11, p1-7. 7p. - Publication Year :
- 2023
-
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. [ABSTRACT FROM AUTHOR]
- Subjects :
- *CATENANES
*POLAR solvents
*BIPYRIDINE
*SUPRAMOLECULAR chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 14337851
- Volume :
- 62
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- Angewandte Chemie International Edition
- Publication Type :
- Academic Journal
- Accession number :
- 162145413
- Full Text :
- https://doi.org/10.1002/anie.202217681