In Situ X- and Q-Band EPR Investigation of Ethylene Polymerization on Cr/SiO2 Phillips Catalyst
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DOI: 10.1021/acs.jpcc.8b07699
Abstract: We present an X- and Q-band electron paramagnetic resonance (EPR) investigation of a 0.5 wt % Cr/SiO2 Phillips catalyst, aimed at establishing the Cr oxidation and spin state under different ethyle... read more here.
Keywords: band; epr investigation; sio2 phillips; phillips catalyst ... See more keywords
Computational Support for Phillips Catalyst Initiation via Cr–C Bond Homolysis in a Chromacyclopentane Site
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DOI: 10.1021/acscatal.7b03724
Abstract: Using density functional theory, we examine a possible homolysis initiation mechanism for the Phillips catalyst, starting from CrII sites exposed to ethylene. Spin-crossing in an abundant quintet bis(ethylene) CrII site leads to cycloaddition to form… read more here.
Keywords: initiation; phillips catalyst; site; homolysis ... See more keywords