New chromium(III)-based catalysts for ethylene oligomerization

Jacek Malinowski; Dagmara Jacewicz; Barbara Gawdzik; Joanna Drzeżdżon

doi:10.1038/s41598-020-73420-6

New chromium(III)-based catalysts for ethylene oligomerization

Sci Rep. 2020 Oct 6;10(1):16578. doi: 10.1038/s41598-020-73420-6.

Authors

Jacek Malinowski¹, Dagmara Jacewicz¹, Barbara Gawdzik², Joanna Drzeżdżon¹

Affiliations

¹ Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308, Gdańsk, Poland.
² Institute of Chemistry, Jan Kochanowski University, Świętokrzyska 15 G, 25-406, Kielce, Poland. b.gawdzik@ujk.edu.pl.

Abstract

The report focuses on the new precatalysts for ethylene oligomerization. The five chromium(III) complex compounds containing the following ligands: dipicolinate anion, oxalate anion, 5-aminopyridine-2-carboxylate anion, 2,2'-bipyridine and 4,4'-dimethoxy-2,2'-bipyridine have been examined towards catalytic activity for ethylene oligomerization. The chromium(III) complexes have been activated by modified methylaluminoxane. The obtained oligomers have been investigated by MALDI-TOF-MS, thermal analysis and infrared spectroscopy. The results revealed that the examined chromium(III) complexes are highly active catalysts for ethylene oligomerization. The values of catalytic activities of the examined complexes are in the range 1860 - 3798 g∙mmol^-1∙h^-1∙bar^-1.

Publication types

Research Support, Non-U.S. Gov't