Method of polymerizing alpha-olefins with boryl zirconocene organic 1,1-dimetallic compound catalysts
AssigneeThe University of Toledo
InventorsMorris Srebnik, Bin Zheng, Laurent Deloux
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Abstract
Boron-zirconium 1,1,-dimetallic organic compounds useful in organic synthesis such as the preparation of alpha-borobromanes. The boron-zirconium compounds include boron and zirconiun, and in particular the synthesis, structure and reactivity of E-chlorobis(cyclopentadienyl)- [1-(4,4,5,5-tetramethyl-1,3,2-dioxaborolane-2-yl)-3,3-dimethylbutenyl]zirc onium (IV). The boron-zirconium 1,1-dimetallic compound is used as a polymerization catalyst to polymerize alpha-olefins such as styrene.
Claims13
A method of polymerizing olefin or styrene monomers comprising reacting said monomer monomer in the presence of a polymerization catalyst that is a bimetallic compound having the structure:
- ##STR20## wherein in structure III, R is t-butyl;
- wherein in structures I, II, IV and V, R is an organic radical having 2-20 carbon atoms that is aliphatic, aromatic, heteroaromatic or cyclic or their halogenated substituted derivatives and R' is an alkyl group of 1-8 carbon atoms.
A method of polymerizing an olefin comprising polymerizing an alpha-olefin or styrene monomers in the presence of a Zr/B bimetallic compound having the following formula:
- ##STR21## where R is an alkyl, except tert-butyl, alkenyl, cycloalkyl, phenyl, alkyl-phenyl or their chloro- or bromo-substituted derivatives;
- where ##STR22## is B-borabicyclo nonyl, and where Cp.sub.2 is bis(cyclopentadienyl).
Dependencies are inferred from the claim text.