Examples of 'quaternary phosphonium' in a sentence
Meaning of "quaternary phosphonium"
quaternary phosphonium: This term refers to a type of organic compound that contains a positively charged phosphorus atom with four organic groups attached. Quaternary phosphonium compounds have various applications in chemistry, such as catalysts, phase-transfer agents, and building blocks for organic synthesis
How to use "quaternary phosphonium" in a sentence
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quaternary phosphonium
No specific advantage is attributed to the quaternary phosphonium.
Quaternary phosphonium compounds are preferred.
Examples of phosphonium hydroxide include quaternary phosphonium hydroxide.
Quaternary phosphonium and sulphonium compounds can also be used.
The nucleation agents also include quaternary phosphonium salts.
Suitable quaternary phosphonium salts are known to the skilled person.
A specific example of the phosphonium hydroxides is quaternary phosphonium hydroxide.
The quaternary phosphonium salts may be used either singly or as combined.
Especially the preferred counter anion in a quaternary phosphonium salt is bromide or chloride.
Examples of quaternary phosphonium salts are cetyltripropylphosphonium bromide and triphenylethylphosphonium bromide.
The alkylation reactor includes an ionic liquid catalyst that is a quaternary phosphonium haloaluminate.
Quaternary ammonium or quaternary phosphonium groups are not formed by this reaction.
The preferred onium iodide catalysts are the quaternary ammonium and quaternary phosphonium iodide compounds.
The addition of quaternary phosphonium halide is inadvisable since it decreases the catalytic activity.
The ionic liquid catalyst comprises a phosphonium based ionic liquid which is a quaternary phosphonium haloaluminate.
See also
Quaternary phosphonium iodides are particularly suitable for use in carrying out the present process.
The crosslinking accelerator is a quaternary phosphonium salt free from a chlorine atom.
A quaternary phosphonium or tertiary phosphine biocide ; and.
Preferred compounds include the amines and the quaternary phosphonium and quaternary ammonium compounds.
When using a quaternary phosphonium salt, tetrabutylphosphonium chloride is preferable.
The preferred ionic moieties are cationic moieties such as quaternary phosphonium and quaternary ammonium groups.
A quaternary phosphonium chloride whose cation corresponds to the formula ( I ) above is advantageously used.
Z is a quaternary ammonium group or quaternary phosphonium group ;.
The precise nature of the quaternary phosphonium ( or ammonium ) cation is not of fundamental importance.
Preferably, the catalyst is a quaternary ammonium compound or a quaternary phosphonium compound.
In these additives, the quaternary phosphonium salt is replaced by an ammonium salt.
Suitable as phase transfer catalyst are quaternary ammonium salts, tertiary amines or quaternary phosphonium salts.
More rarely, the basic groups may be quaternary phosphonium groups or sulphonium groups.
The electropositive complexing sites are in particular quaternary ammonium, protonated tertiary amine or quaternary phosphonium.
The digital video disk substrate of 5, wherein the quaternary phosphonium salt is tetraphenylphosphonium tetraphenylborate.
Suitable phase transfer catalysts are quaternary ammonium salts, tertiary amines or quaternary phosphonium salts.
Other useful catalysts include quaternary phosphonium compounds, sulfonium compounds and the like.
Suitable cationic surfactants include, alkyl quaternary ammonium salts, and alkyl quaternary phosphonium salts.
For example, quaternary ammonium hydroxides, quaternary phosphonium hydroxides, and hexaalkylguanidinium hydroxides may be employed.
Suitable cationic emulsifiers are, for example, alkyl quaternary ammonium salts, and alkyl quaternary phosphonium salts.
Quaternary ammonium groups, quaternary phosphonium groups and sulfonium groups also represent examples of cationic group.
Preferred cationic species are quaternary ammonium salts, quaternary phosphonium salts and crown ethers.
Category: Quaternary phosphonium compounds.
The positively charged groups are advantageously quaternary ammonium groups, quaternary phosphonium groups and / or guanidinium groups.
Quaternary phosphonium salts ;.
Onium salts such as quaternary ammonium salts, quaternary phosphonium salts are preferable among them.
Quaternary phosphonium compounds, such as tetra-n-butyl phosphonium bromide, and tetraphenyl phosphonium bromide ;.
Suitable such reagents include quaternary ammonium compounds, quaternary phosphonium compounds, crown ethers and cryptates.
Quaternary phosphonium cations ( PR+ 4 ) are produced by alkylation of organophosphines.
Q + represents a quaternary ammonium and / or quaternary phosphonium ion.
Quaternary ammonium and / or quaternary phosphonium halides, in particular chlorides and / or bromides ;.
Examples include tetraalkylammonium hydroxide ( e.g. tetraethylammonium hydroxide ) or a quaternary phosphonium salt.
In this embodiment, the preferred quaternary phosphonium halide complex is tributylhexylphosphonium - Al2Cl7.
Among these compounds, preferred are the quaternary phosphonium ( or ammonium ) iodides.
Represents H, an alkali metal ; a quaternary phosphonium group or a quaternary ammonium group ;.
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Quaternary ammonium and phosphonium salts are preferred
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