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Patent

Transition metal donor complexes and olefin polymerization process

TL;DR: In this paper, a process for polymerization of addition polymerizable monomers with a catalyst composition comprising a Group 4 or 5 metal bis(silane)amido complex corresponding to the formula (1) where the various substituents are as defined in claim 1.
Abstract: A process for polymerization of addition polymerizable monomers with a catalyst composition comprising a Group 4 or 5 metal bis(silane)amido complex corresponding to the formula (1) where the various substituents are as defined in claim 1.
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Journal ArticleDOI
TL;DR: A new family of olefin polymerization catalysts, derived from iron and cobalt complexes bearing 2,6-bis(imino)pyridyl ligands, was described in this paper.

1,045 citations

Journal ArticleDOI
TL;DR: In this article, a series of dinuclear complexes of zirconium and tantalum is presented in an effort to determine factors involved in the coordination mode of the bridging dinitrogen ligand.
Abstract: The preparation of a series of dinuclear complexes of zirconium and tantalum is presented in an effort to determine factors involved in the coordination mode of the bridging dinitrogen ligand. Reduction of ZrCl 3 [N(SiMe 2 -CH 2 PR 2 ) 2 ] (R=Pr i and Bu t ) with Na/Hg under N 2 generates the corresponding dinitrogen complexes ([(R 2 PCH 2 -SiMe 2 ) 2 N]ZrCl) 2 (μ-η 2 :η 2 -N 2 ); the X-ray crystal structure of the dark blue derivative having R=Pr i shows that the dinitrogen unit is bridging in a planar, side-on bonding mode.

105 citations

Patent
12 Jan 1998
TL;DR: Propylene may be polymerized by contacting it with certain iron complexes of selected 2,6-pyridinecarboxaldehydebis (imines) and 2, 6-diacylpyridinebis (IMines) as discussed by the authors.
Abstract: Propylene may be polymerized by contacting it with certain iron complexes of selected 2,6-pyridinecarboxaldehydebis (imines) and 2,6-diacylpyridinebis (imines). The polymers produced are useful as molding resins.

83 citations