Examples of 'external electron' in a sentence
Meaning of "external electron"
external electron - This phrase is used in the context of physics to describe an electron that is not bound to an atom or molecule
How to use "external electron" in a sentence
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external electron
Step of an external electron to an orbital internal one.
Organosilicon compounds are commonly used as external electron donors.
Mixtures of external electron donors can also be used.
It is generally called an external electron donor.
Mixtures of external electron donors can be used if desired.
Negative ions is produced by coupling an external electron to a neutral atom.
External electron may occupy a discrete number of energy levels.
Optionally an external electron donor compound.
This organosilicon compound is sometimes termed an external electron donor.
There is no external electron donor.
Preferably the catalyst also comprises an external electron donor.
An external electron donor compound comprising at least one organosilicon compound.
Preferably the cocatalyst also comprises an external electron donor.
This cuts to zero any external electron emission from the source.
If needed the activator may also include an external electron donor.
See also
These external electron donor compounds may be used either individually or in combination.
Such a donor is in the art called an external electron donor.
A suitable external electron donor is for example a phtalate or a succinate or a diether compound.
How this is performed depends on which external electron acceptor is available.
An external electron donor may also be present during the polymerisation of an olefine.
Caesium is then neutralised by adding an external electron though thin foil implantation.
External electron donors may be used to further control the amount of atactic polymer produced.
Preferably an alkoxysilane is used as the external electron donor during the polymerization.
External electron donors affect the level of stereoregularity and MFR in polymerization reactions.
Preferably, these organosilicon compounds are used as an external electron donor.
Both the internal and external electron donor compounds become indispensable compositions of catalyst components.
Catalyst according to claim 18 further comprising an external electron donor compound.
Additionally, an external electron donor is generally used.
A cocatalyst comprising an aluminium alkyl and optionally an external electron donor ; and.
As external electron donors also organo-silicon compounds can be used.
Also, a mixture of two or more external electron donor compounds may be used.
As external electron donor also organo-silicon compounds can be used.
In the above catalyst composition, a conventional dosage of the external electron donor can be used.
An external electron donor may also be present during the polymerization of the olefine ( s ).
The catalyst system may contain another type of external electron donor compound, an organosilicon compound.
These external electron donor can be the same as, or different from, the internal donor.
The catalyst system includes the said catalyst, organoaluminum compounds and / or external electron donors.
Preferred external electron donors are silane donors, which are suitably used with aluminium trialkyl compounds.
B one or more aluminum alkyl compounds and, optionally, C an external electron donor compound.
External electron donor compounds ( ED ) are well known to those skilled in the art.
In the polymerization process of the present invention the external electron donor ( ED ) is optional.
An external electron donor, and.
Yet a third component often employed in Ziegler-type catalyst systems is a so-called external electron donor.
Another type of preferred external electron donor compounds ( c ) is benzoates.
Silanes, especially dihydrocarbyl dihydrocarbyloxy silanes, especially di - ( lower alkyl ) dimethoxy silanes, are effective external electron donors.
Alkyl aluminium compound, optionally, external electron donor component.
Also, the external electron donor ( h ) is introduced to maximize the stereospecificity.
Process according to claim 21 in which the external electron donor is p-ethoxy-ethylbenzoate.
Suitable external electron donor compounds include silicon compounds, ethers, esters, amines, heterocyclic compounds.
For the present invention the external electron donor ( ED ) is optional.
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