Bimetallic Effects on Ethylene Polymerization in the Presence of Amines: Inhibition of the Deactivation by Lewis Bases
Abstract
Dinickel complexes supported by terphenyl ligands appended with phenoxy and imine donors were synthesized. Full substitution of the central arene blocks rotation around the aryl–aryl bond and allows for the isolation of atropisomers. The reported complexes perform ethylene polymerization in the presence of amines. The inhibiting effect of polar additives is up to 250 times lower for the syn isomer than the anti isomer. Comparisons with mononuclear systems indicate that the proximity of the metal centers leads to the observed inhibitory effect on the deactivation of the catalysts.
Additional Information
© 2012 American Chemical Society. Published In Issue January 25, 2012; Article ASAP January 12, 2012; Just Accepted Manuscript January 06, 2012; Received: November 22, 2011. We thank Lawrence M. Henling for crystallographic assistance. We are grateful to Caltech and Dow Chemical for funding. The Bruker KAPPA APEXII X-ray diffractometer was purchased via an NSF CRIF:MU award to Caltech (CHE-0639094). The 400 MHz NMR spectrometer was purchased via NIH Award RR027690.Attached Files
Accepted Version - nihms349781.pdf
Supplemental Material - ja210990t_si_001.pdf
Supplemental Material - ja210990t_si_002.cif
Supplemental Material - ja210990t_si_003.cif
Supplemental Material - ja210990t_si_004.cif
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Additional details
- PMCID
- PMC3307529
- Eprint ID
- 29958
- DOI
- 10.1021/ja210990t
- Resolver ID
- CaltechAUTHORS:20120403-131656142
- Caltech
- Dow Chemical
- NSF
- CHE-0639094
- NIH
- RR027690
- Created
-
2012-04-05Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field