Examples of 'phase transfer catalysts' in a sentence
Meaning of "phase transfer catalysts"
phase transfer catalysts: This phrase is used in chemistry to describe substances or compounds that facilitate the transfer of reactants from one phase to another in a chemical reaction. Phase transfer catalysts help in speeding up reactions that involve components in different states of matter, such as solid-liquid or liquid-liquid reactions
How to use "phase transfer catalysts" in a sentence
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phase transfer catalysts
Phase transfer catalysts can also be used.
Different types of phase transfer catalysts may be employed.
Phase transfer catalysts may also be added to improve reactivity.
It may be expedient to include the use of phase transfer catalysts.
Suitable phase transfer catalysts are tetraalkylammonium salts.
The reaction is carried out using phase transfer catalysts viz.
Suitable phase transfer catalysts include tetrasubstituted ammonium chlorides.
The use of hexaalkylguanidinium salts as phase transfer catalysts in various reactions is known.
Preferred phase transfer catalysts are polar solvents such as ethers or alcohols.
Any suitable labeling reagents and phase transfer catalysts may be used.
These phase transfer catalysts can be used either singly or in admixture.
Cyclic polyols such as crown ethers or cryptates are preferred phase transfer catalysts.
Various types of phase transfer catalysts may be employed for this purpose.
The surfactants include cationic surfactants which are stated to include phase transfer catalysts.
These phase transfer catalysts are available as reagents or industrial bulk materials generally.
See also
Crown ethers and quaternary amine salts are also useful as phase transfer catalysts.
The phase transfer catalysts which can be chosen are known in the art.
The authors also describe the selective activity for various phase transfer catalysts in particular reactions.
Numerous examples of phase transfer catalysts are known to those of skill in the art.
In some embodiments, polyalkylene glycol ethers are useful as phase transfer catalysts.
The phase transfer catalysts are used in the process in small but catalytic amounts.
Also present during the interfacial polymerization reactions are phase transfer catalysts and molecular weight regulators.
In one aspect the phase transfer catalysts can be a quaternary ammonium or phosphonium salt.
In organic chemistry, quaternary ammonium salts are employed as phase transfer catalysts PTCs.
The phase transfer catalysts typically employed in the interfacial process are amine salts.
As necessary, two or more phase transfer catalysts can be used.
Known phase transfer catalysts include tetralkyl ammonium halides and phosphonium salts.
Polyalkylene glycol compounds useful as phase transfer catalysts can be represented by the formula, 2.
Phase transfer catalysts are well known to one skilled in the art of organic synthesis.
Particularly suitable phase transfer catalysts are the Crown ethers.
Phase transfer catalysts can be added, if appropriate.
Generally, known phase transfer catalysts are suitable.
Phase transfer catalysts include tetralkylammonium salts, phosphonium salts and crown ethers.
Cryptands are another class of compounds useful in the base-mediated dehydrohalogenation as phase transfer catalysts.
A wide range of phase transfer catalysts according to the present invention can be used.
Example 9 Further experiments with various phase transfer catalysts were carried out.
Suitable phase transfer catalysts for use in the present invention are known and varied.
For anionic polar moieties, suitable phase transfer catalysts are quaternary ammonium and / or phosphonium compounds.
Phase transfer catalysts that can be used are tetrabutylammonium salts, preferably tetrabutylammonium hydrogen sulphate.
The particularly preferred phase transfer catalysts are tetraalkylammonium halides, tetraarylphosphonium halides and crown ethers.
Phase transfer catalysts may be cationic, anionic, or neutral.
The effects of different phase transfer catalysts in the plasticizer migration, are shown in Table 3.
The phase transfer catalysts are useful in preparing mono-substituted cyclopentadiene derivatives.
For example, phase transfer catalysts are preferred when xylenes or toluene is used.
Phase transfer catalysts are known in the art and described e.g. in Surv.
Examples of chiral phase transfer catalysts include chiral crown ethers or, more preferably, cinchona alkaloids.
Other phase transfer catalysts which may be suitable include crown ethers and polyethylene glycols.
Other phase transfer catalysts which may be suitable include crown ethers and polyethylene glycol variants.
Suitable phase transfer catalysts are polyethylene glycols, quaternary ammonium salts and crown ethers.
Typical phase transfer catalysts include benzyltrimethylammonium hydroxide, tetraethylammonium hydroxide and tetrabutylammonium hydroxide.
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