Examples of 'metallocene compounds' in a sentence
Meaning of "metallocene compounds"
metallocene compounds - This phrase refers to a class of organometallic compounds containing two cyclopentadienyl anions bound to a metal ion in the oxidation state II. These compounds have diverse applications in catalysis, material science, and polymer chemistry due to their unique structures and properties
How to use "metallocene compounds" in a sentence
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metallocene compounds
Metallocene catalysts are based on metallocene compounds.
The metallocene compounds are contacted with an activator to produce an active catalyst.
The present invention relates to bridged metallocene compounds.
Also weakly physisorbed metallocene compounds can be found on the support.
The compositions are produced by catalyst systems based on metallocene compounds.
The metallocene compounds in this invention may be synthesized by a conventional method.
No bridged metallocenes were synthesized and no hafnium metallocene compounds were synthesized.
The synthesis of the metallocene compounds of the invention are well known.
Catalyst compositions containing these unbridged hybrid metallocene compounds are disclosed.
The metallocene compounds in this invention can be synthesized by a conventional method.
In order to resolve these difficulties several supported metallocene compounds have been proposed.
As metallocene compounds it is possible to use any kind and type of metallocene.
None of the above publications however mentions metallocene compounds of transition metals.
The metallocene compounds utilized can be used as crystalline solids or solutions in hydrocarbons.
The present applicant has earnestly studied a variety of crosslinked metallocene compounds.
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It is known that metallocene compounds can be used in various reactions of industrial interest.
It is therefore advantageous to produce only the racemic form of the metallocene compounds.
Metallocene compounds with silicon hydrocarbyl radical bridges are not disclosed or suggested.
The homogeneous catalysts employed are desirably metallocene or post metallocene compounds as aforementioned.
Metallocene compounds having two cyclopentadienyl moieties bridged by a single atom are also known.
The present inventors have discovered metallocene compounds that have this capability.
Metallocene compounds are defined as organometallic coordination compounds obtained as cyclopentadienyl derivatives of a transition metal.
The preferred catalyst systems based on metallocene compounds are usually used in supported form.
The metallocene compounds discussed above are activated to form the metallocene catalyst system.
The preferred catalyst systems based on metallocene compounds are usually employed in supported form.
Metallocene compounds are known which are active as catalyst components in the olefin polymerization reactions.
Methods of making the hybrid metallocene compounds of the present invention are also provided.
Some such compounds have been found particularly useful for preparing metallocene compounds.
A wide range of metallocene compounds are suitable for use in the methods disclosed herein.
It is also possible to use catalysts obtained from metallocene compounds and aluminoxane compounds.
Additional unbridged metallocene compounds can be employed in catalyst compositions of the present invention.
The polyolefin resin is polymerized in the presence of four different metallocene compounds as catalysts.
Catalyst systems comprising metallocene compounds have shown promise in tailoring polymer properties.
This invention provides a supported metallocene catalyst by reacting the metallocene compounds with a support.
The metallocene compounds described herein are synthesized according to procedures known in the art.
These references describe protonation of metallocene compounds by anion precursors to form stable ionic catalysts.
Metallocene compounds having two cyclopentadienyl groups bridged by a single carbon atom are also known.
These publications teach the general structure of metallocene compounds and include alumoxane as the cocatalyst.
Suitable metallocene compounds that can be employed include any metallocene compounds known in the art.
Recent catalyst developments have resulted in metallocene catalysts which comprise metallocene compounds of transition metals.
The bridged metallocene compounds of catalyst component II also are discussed above.
Catalyst component I is not limited solely to unbridged metallocene compounds such as described above.
The single atom bridged metallocene compounds of catalyst component II also are discussed hereinabove.
Catalyst component I is not limited solely to unbridged metallocene compounds.
The metallocene compounds of catalyst component I are discussed above.
Example 7 reflects the use of metallocene compounds having methyls at the metal.
The metallocene compounds of catalyst component I are discussed hereinabove.
In an aspect of this invention, the metallocene compounds can have the formula,.
These metallocene compounds may be used to produce the components A and B.
For convenience, these compounds will be referred to herein as hybrid metallocene compounds.
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