Chromium Ethylene Tri-/Tetramerization Catalysts Supported by Iminophosphine Ligands

[Image: see text] A new class of highly active ethylene tri-/tetramerization chromium catalysts supported by iminophosphine ligands has been studied. The impact of electronic and steric changes of these ligands on selectivity and activity has been investigated by varying P- and/or N-substituents. Up...

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Autores principales: Zhao, Xing, Wang, Jihe, Liu, Dongchang, Kong, Weihuan, Zhang, Jun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2023
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10536060/
https://www.ncbi.nlm.nih.gov/pubmed/37780000
http://dx.doi.org/10.1021/acsomega.3c03356
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author Zhao, Xing
Wang, Jihe
Liu, Dongchang
Kong, Weihuan
Zhang, Jun
author_facet Zhao, Xing
Wang, Jihe
Liu, Dongchang
Kong, Weihuan
Zhang, Jun
author_sort Zhao, Xing
collection PubMed
description [Image: see text] A new class of highly active ethylene tri-/tetramerization chromium catalysts supported by iminophosphine ligands has been studied. The impact of electronic and steric changes of these ligands on selectivity and activity has been investigated by varying P- and/or N-substituents. Upon activation with MMAO, the ligand bearing a P-cyclohexyl group displayed a high activity of 307 kg/(g Cr/h) with a high trimerization selectivity of 92.6%. Decreasing the steric hindrance of N-aryl group led to a decrease in 1-hexene selectivity (74.5%), producing more 1-octene (10.3%). X-ray diffraction analysis verifies that the ligands coordinate with the chromium center in a κ(2)-P,N mode.
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spelling pubmed-105360602023-09-29 Chromium Ethylene Tri-/Tetramerization Catalysts Supported by Iminophosphine Ligands Zhao, Xing Wang, Jihe Liu, Dongchang Kong, Weihuan Zhang, Jun ACS Omega [Image: see text] A new class of highly active ethylene tri-/tetramerization chromium catalysts supported by iminophosphine ligands has been studied. The impact of electronic and steric changes of these ligands on selectivity and activity has been investigated by varying P- and/or N-substituents. Upon activation with MMAO, the ligand bearing a P-cyclohexyl group displayed a high activity of 307 kg/(g Cr/h) with a high trimerization selectivity of 92.6%. Decreasing the steric hindrance of N-aryl group led to a decrease in 1-hexene selectivity (74.5%), producing more 1-octene (10.3%). X-ray diffraction analysis verifies that the ligands coordinate with the chromium center in a κ(2)-P,N mode. American Chemical Society 2023-09-12 /pmc/articles/PMC10536060/ /pubmed/37780000 http://dx.doi.org/10.1021/acsomega.3c03356 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Zhao, Xing
Wang, Jihe
Liu, Dongchang
Kong, Weihuan
Zhang, Jun
Chromium Ethylene Tri-/Tetramerization Catalysts Supported by Iminophosphine Ligands
title Chromium Ethylene Tri-/Tetramerization Catalysts Supported by Iminophosphine Ligands
title_full Chromium Ethylene Tri-/Tetramerization Catalysts Supported by Iminophosphine Ligands
title_fullStr Chromium Ethylene Tri-/Tetramerization Catalysts Supported by Iminophosphine Ligands
title_full_unstemmed Chromium Ethylene Tri-/Tetramerization Catalysts Supported by Iminophosphine Ligands
title_short Chromium Ethylene Tri-/Tetramerization Catalysts Supported by Iminophosphine Ligands
title_sort chromium ethylene tri-/tetramerization catalysts supported by iminophosphine ligands
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10536060/
https://www.ncbi.nlm.nih.gov/pubmed/37780000
http://dx.doi.org/10.1021/acsomega.3c03356
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AT kongweihuan chromiumethylenetritetramerizationcatalystssupportedbyiminophosphineligands
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