Chromium‐Catalyzed Highly Selective Oligomerization of Ethene to 1‐Hexene with N,N‐Bis[chloro(aryl)phosphino]amine Ligands

Different N,N‐bis[chloro(aryl)phosphino]amines were synthesized and characterized. The synthesized compounds were tested as ligands in the Cr‐catalyzed oligomerization of ethene. The effect of the successive increase of the steric bulk either at one of the P substituents or at the N center on the pr...

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Bibliographic Details
Published in:ChemCatChem 2017-07, Vol.9 (13), p.2467-2472
Main Authors: Höhne, Martha, Peulecke, Normen, Konieczny, Katharina, Müller, Bernd H., Rosenthal, Uwe
Format: Article
Language:English
Subjects:
Amines
Aromatic compounds
Chemical synthesis
Chlorination
Chromium
Ethene
ligand effects
Ligands
Methylation
Oligomerization
structure–activity relationships
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Summary:Different N,N‐bis[chloro(aryl)phosphino]amines were synthesized and characterized. The synthesized compounds were tested as ligands in the Cr‐catalyzed oligomerization of ethene. The effect of the successive increase of the steric bulk either at one of the P substituents or at the N center on the product distribution of the oligomerization reaction was examined. We found a highly active and selective trimerization system with purities of the hexene fraction up to 99.9 % for 1‐hexene. Furthermore, we suppose an in situ methylation of the chlorinated ligands into the corresponding N,N‐bis[methyl(aryl)phosphino]amines. Keen for hexene: Different N,N‐bis[chloro(aryl)phosphino]amines form highly active and selective trimerization catalysts that lead to purities of the hexene fraction up to 99.9 % for 1‐hexene. Furthermore, an in situ methylation of the chlorinated ligands into N,N‐bis[methyl(aryl)phosphino]amines is supposed.
ISSN:1867-3880
1867-3899
DOI:10.1002/cctc.201700448