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dc.contributor.authorChabbra, Sonia
dc.contributor.authorSmith, D. M.
dc.contributor.authorBell, Nicola Louise
dc.contributor.authorWatson, Allan John Bell
dc.contributor.authorBuehl, Michael
dc.contributor.authorCole-Hamilton, David John
dc.contributor.authorBode, Bela Ernest
dc.date.accessioned2020-12-23T17:30:01Z
dc.date.available2020-12-23T17:30:01Z
dc.date.issued2020-12-18
dc.identifier.citationChabbra , S , Smith , D M , Bell , N L , Watson , A J B , Buehl , M , Cole-Hamilton , D J & Bode , B E 2020 , ' First experimental evidence for a bis-ethene chromium(I) complex forming from an activated ethene oligomerization catalyst ' , Science Advances , vol. 6 , no. 51 , eabd7057 . https://doi.org/10.1126/sciadv.abd7057en
dc.identifier.issn2375-2548
dc.identifier.otherPURE: 271012506
dc.identifier.otherPURE UUID: ab0f8290-de0b-4001-b736-fbc49f400400
dc.identifier.otherORCID: /0000-0002-1095-7143/work/85562833
dc.identifier.otherORCID: /0000-0002-3384-271X/work/85567052
dc.identifier.otherORCID: /0000-0002-1582-4286/work/85569371
dc.identifier.otherPubMed: 33355141
dc.identifier.otherWOS: 000599905500041
dc.identifier.otherScopus: 85099077527
dc.identifier.urihttp://hdl.handle.net/10023/21196
dc.descriptionFunding: This work was supported by Sasol Ltd. SC is grateful for a St Leonard’s postgraduate fellowship by the University of St Andrews.en
dc.description.abstractA bis-ethene chromium(I) species, which is the postulated key intermediate in the widely accepted metallacyclic mechanism for ethene oligomerization, is experimentally observed. This catalytic transformation is an important commercial route to linear α-olefins (primarily, 1-hexene and 1-octene), which act as comonomers for the production of polyethene. Here, electron paramagnetic resonance studies of a catalytic system based on [Cr(CO)4(PNP)][Al(OC(CF3)3)4] [PNP = Ph2PN(iPr)PPh2] activated with Et6Al2 provide the first unequivocal evidence for a chromium(I) bis-ethene complex. The concentration of this species is enhanced under ethene and isotope labeling studies that confirm its composition as containing [Cr(C2H4)2(CO)2(PNP)]+. These observations open a new route to mechanistic studies of selective ethene oligomerization.
dc.format.extent7
dc.language.isoeng
dc.relation.ispartofScience Advancesen
dc.rightsCopyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY). https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution license, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.en
dc.subjectQD Chemistryen
dc.subjectDASen
dc.subject.lccQDen
dc.titleFirst experimental evidence for a bis-ethene chromium(I) complex forming from an activated ethene oligomerization catalysten
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.Sir James Mackenzie Institute for Early Diagnosisen
dc.contributor.institutionUniversity of St Andrews.School of Chemistryen
dc.contributor.institutionUniversity of St Andrews.EaSTCHEMen
dc.contributor.institutionUniversity of St Andrews.Biomedical Sciences Research Complexen
dc.contributor.institutionUniversity of St Andrews.Centre of Magnetic Resonanceen
dc.identifier.doihttps://doi.org/10.1126/sciadv.abd7057
dc.description.statusPeer revieweden
dc.date.embargoedUntil2020-12-18


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