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Syntheses, characterization and ethylene polymerization of half-sandwich group IV metal complexes with tridentate [O,N,S] ligands

Content Provider	Springer Nature Link
Author	Qiao, Ya lin Hu, Ping Jin, Guo xin
Copyright Year	2013
Abstract	A series of half-sandwich group IV metal complexes with tridentate monoanionic phenoxy-imine arylsulfide [O−NS] ligand [2-Bu t 4-Me-6-((2-(SC6H5)C6H4N=CHC6H2O)]− (La) and dianionic phenoxy-amine arylsulfide [O−N−S] ligand [2-Bu t 4-Me-6-((2-(SC6H5)C6H4N-CH2C6H2O)]2− (Lb) have been synthesized and characterized. Lb was obtained easily in high yield by reduction of ligand La with excess LiAlH4 in cool diethyl ether. Half-sandwich Group IV metal complexes CpTi[O−NS]Cl2 (1a), CpZr[O−NS]Cl2 (1b), CpTi[O−N−S]Cl (2a), CpZr[O−N−S]Cl (2b) and CpZr[O−N−S]Cl (2c) were synthesized by the reactions of La and Lb with CpTiCl3, CpZrCl3 and CpZrCl3, and characterized by IR, 1H-NMR, 13C-NMR and elemental analysis. In addition, an X-ray structure analysis was performed on ligand Lb. The title Group IV half-sandwich bearing tridentate [O,N,S] ligands show good catalytic activities for ethylene polymerization in the presence of methylaluminoxane (MAO) as co-catalyst up to 1.58 × 107 g-PE·mol-Zr−1·−1. The good catalytic activities can be maintained even at high temperatures such as 100 °C exhibiting the excellent thermal stability for these half-sandwich metal pre-catalysts.
Starting Page	760
Ending Page	768
Page Count	9
File Format	PDF
ISSN	02567679
Journal	Chinese Journal of Polymer Science
Volume Number	31
Issue Number	5
e-ISSN	14396203
Language	English
Publisher	Chinese Chemical Society and Institute of Chemistry, CAS
Publisher Date	2013-04-20
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Half-sandwich group IV metal complexes Tridentate dianionic ligands Phenoxy-imine arylsulfide ligands Catalyst Ethylene polymerization Polymer Sciences Industrial Chemistry/Chemical Engineering Characterization and Evaluation of Materials Condensed Matter Physics
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Chemical Engineering Polymers and Plastics

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