Examples of 'metallocenes' in a sentence
Meaning of "metallocenes"
A compound typically containing a transition metal with two cyclopentadienyl anions bound to it, used in catalysis and organic synthesis
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- plural of metallocene
How to use "metallocenes" in a sentence
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metallocenes
Bent metallocenes are represented by compounds of the type.
A special class of sandwich complexes are the metallocenes.
Metallocenes may be useful for isotope separation.
The selection of metallocenes is based on many factors.
Metallocenes and catalyst compositions derived therefrom.
No examples of these metallocenes supported on a carrier were given.
Metallocenes have the general formula.
Various types of metallocenes are known in the art.
Metallocenes as defined in the instant invention are particularly preferred.
In one embodiment the metallocenes of the invention are asymmetic.
Metallocenes can be described by the empirical formula CpmMAnBP.
The catalyst composition includes at least two metallocenes.
The metallocenes were obtained from internal sources.
Ionizing activators may also be used to activate metallocenes.
These metallocenes are referred to herein as bridged metallocenes.
See also
The present invention relates to metallocenes.
The metallocenes are preferably employed as chiral racemates.
Examples of organometallic redox species are metallocenes such as ferrocene.
The metallocenes in this group are unusual.
Similar relationships can be established for isospecific metallocenes.
The key to metallocenes is the structure of the complex.
Some specific examples of metallocenes are given.
The inventive metallocenes may be either bridged or unbridged.
Ionizing activators may also be used with metallocenes.
Also metallocenes of these ligands are provided.
A suitable cocatalyst for the metallocenes.
Bridged metallocenes may be made by one of several methods.
High activity ethylene selective metallocenes.
Chiral metallocenes are useful for the synthesis of polyolefins.
This invention relates to metallocenes.
Metallocenes are a subset of a broader class of compounds called sandwich compounds.
In general the solubility of metallocenes varies and is difficult to predict.
Metallocenes of use in this invention can therefore be symmetrical or asymmetrical.
Olefin polymer prepared by a catalyst system with three metallocenes.
These metallocenes are therefore conventional supported on a carrier such as silica.
Lewis acids may be used to activate the metallocenes described.
Metallocenes containing such a bridging group are often referred to as stereorigid.
The most commonly used cocatalyst for metallocenes is aluminoxane.
Such metallocenes are expressly excluded.
These systems are called metallocenes.
These metallocenes were not prepared.
There exist supporting techniques to place metallocenes on inert carriers.
No bridged metallocenes were synthesized and no hafnium metallocene compounds were synthesized.
Mixtures of two or more different metallocenes can also be used.
Metallocenes are used in the polymerization.
This invention relates to metallocenes containing at least one benzofluorenyl ligand.
Metallocenes are used as ethylene polymerization catalysts in either supported or unsupported form.
Illustrative examples of bridged metallocenes containing bridged benzofluorenyl ligands include.
The invention is considered applicable to both bridged and unbridged metallocenes.
The metallocenes may be supported.
