A cavity-shaped -chelating P,N ligand for highly selective nickel-catalysed ethylene dimerisation

The presence of a permethylated α-cyclodextrin (α-CD) cavity in a chelating P,N ligand promotes exclusive formation of 1 : 1 ligand/metal complexes. In MX 2 complexes, one of the two halido ligands is forced to reside inside the CD hollow while the second one is pointing outside. Unlike its cavity-f...

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Published inDalton transactions : an international journal of inorganic chemistry Vol. 51; no. 3; pp. 11226 - 1123
Main Authors Li, Yang, Pelzer, Katrin, Sechet, Damien, Creste, Geordie, Matt, Dominique, Braunstein, Pierre, Armspach, Dominique
Format Journal Article
Published 02.08.2022
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Summary:The presence of a permethylated α-cyclodextrin (α-CD) cavity in a chelating P,N ligand promotes exclusive formation of 1 : 1 ligand/metal complexes. In MX 2 complexes, one of the two halido ligands is forced to reside inside the CD hollow while the second one is pointing outside. Unlike its cavity-free analogue, a Ni( ii ) complex of the CD ligand is a highly selective precatalyst for ethylene dimerisation (96% C 4 selectivity with up to 95% of 1-butene within the C 4 fraction). The presence of a cyclodextrin cavity in a chelating P,N ligand promotes the exclusive formation of 1 : 1 ligand/metal complexes. A Ni( ii ) complex of the ligand is a very selective catalyst for ethylene dimerisation as a result of metal confinement.
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For ESI and crystallographic data in CIF or other electronic format see DOI
Electronic supplementary information (ESI) available: Synthesis and characterization data. CCDC
2163663
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https://doi.org/10.1039/d2dt01553f
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ISSN:1477-9226
1477-9234
DOI:10.1039/d2dt01553f