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Broomfield, Lewis M., Sarazin, Yann, Wright, Joseph A. 
ORCID: https://orcid.org/0000-0001-9603-1001, Hughes, David L., Clegg, William, Harrington, Ross W. and Bochmann, Manfred ORCID: https://orcid.org/0000-0001-7736-5428
(2007)
Mixed-ligand iminopyrrolato-salicylaldiminato group 4 metal complexes: Optimising catalyst structure for ethylene/propylene copolymerisations.
Journal of Organometallic Chemistry, 692 (21).
pp. 4603-4611.
Abstract
Treatment of MCl3(OC6H3-2-tBu-6-CH==NC6F5)(THF) (M = Ti, Zr) with a variety of different potassium iminopyrrolate salts (K+[RN==CHC4H3N]-), (R = phenyl, cyclo-hexyl, ethyl) afforded the corresponding titanium and zirconium mixed-ligand complexes MCl2(N–O)(N–N). The molecular structures of TiCl2(OC6H3-2-tBu-6-CH==NC6F5)(C2H5N==CHC4H3N) (1c), TiCl2(OC6H3-2-tBu-6-CH==NC6F5)(C6H11N==CHC4H3N) (1b) and ZrCl2(OC6H3-2-tBu-6-CH==NC6F5)(C6H11N==CHC4H3N) (2b) show distorted octahedral geometries with trans-O-,N-/cis-Cl2 arrangements. On activation with MAO the titanium (iminopyrrolato)(salicylaldiminato) complexes show excellent activities in ethylene polymerisation and are significantly more effective ethylene/propylene copolymerisation catalysts, both in terms of activity and propene incorporation, than either of the parent complexes. The ethylene–propylene copolymers show ca. 80% 1,2 regioselectivity and at high propylene incorporation tend towards an alternating structure.
| Item Type: | Article |
|---|---|
| Faculty \ School: | Faculty of Science > School of Chemistry |
| UEA Research Groups: | Faculty of Science > Research Groups > Energy Materials Laboratory Faculty of Science > Research Groups > Chemistry of Materials and Catalysis Faculty of Science > Research Groups > Chemistry of Light and Energy Faculty of Science > Research Groups > Synthetic Chemistry (former - to 2017) |
| Depositing User: | Rachel Smith |
| Date Deposited: | 02 Nov 2010 17:48 |
| Last Modified: | 09 Jan 2024 01:22 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/10538 |
| DOI: | 10.1016/j.jorganchem.2007.04.047 |
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