Examples of 'tetraalkylammonium' in a sentence
Meaning of "tetraalkylammonium"
Tetraalkylammonium is a type of compound containing a positively charged quaternary nitrogen atom bound to four alkyl groups. It is commonly used in organic chemistry as a counterion or phase-transfer catalyst
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- Any alkyl quaternary ammonium ion
How to use "tetraalkylammonium" in a sentence
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tetraalkylammonium
A wide variety of tetraalkylammonium salts can be used.
Tetraalkylammonium salts may also be employed as promoters if desired.
The resulting solution is a tetraalkylammonium aluminate solution.
Any tetraalkylammonium fluoride can be employed herein.
This document mentions in particular tetraalkylammonium tetrafluoroborate.
The tetraalkylammonium is in general tetramethylammonium.
Suitable phase transfer catalysts are tetraalkylammonium salts.
The tetraalkylammonium is generally tetramethylammonium.
The base typically is a tetraalkylammonium hydroxide.
Tetraalkylammonium cations are especially preferred.
The hydrolysis by using tetraalkylammonium hydroxide is quite novel reaction.
Alternatively the base may be selected from trialkylamine or tetraalkylammonium.
Said tetraalkylammonium tetrafluoroborates have to be essentially free from halides.
Alternatively the base may be a trialkylamine or a tetraalkylammonium hydroxide or alkoxide.
The resultant tetraalkylammonium salt can be readily converted to other salts.
See also
Quaternary ammonium salts can also be obtained from tetraalkylammonium bases by neutralization.
Tetraalkylammonium halides are preferred.
A phase transfer catalyst such as a tetraalkylammonium halide salt is preferably included.
The tetraalkylammonium cation may be tetraethylammonium or tetrabutylammonium but it is not so limited.
Suitable auxiliary halogen sources are tetraalkylammonium halides such as benzyltrimethylammonium chloride.
A method according to any preceding claim wherein the catalyst is a tetraalkylammonium base.
The tetraalkylammonium hydroxides are often preferred because of their availability and particular suitability.
Said patent discloses two processes for the manufacture of tetraalkylammonium tetrafluoroborates.
Suitable tetraalkylammonium bromide include tetrabutylammonium Bromide.
Further the hydrolysis of camphorsultam derivatives by using tetraalkylammonium hydroxide is novel reaction.
Of these, tetraalkylammonium hydroxides are preferred for use.
The reaction mixture may optionally include NaI or a tetraalkylammonium iodide to accelerate the reaction.
Tetraalkylammonium hyaluronate can be obtained by freeze-drying the eluate.
Examples of suitable bases include tetraalkylammonium hydroxides and alkali metal alkoxides and hydroxides.
Exemplary catalysts for acceleration of the reaction include alkali metal halides or tetraalkylammonium halides.
Preferably, the tetraalkylammonium iodide is tetraethylammonium iodide.
In some embodiments, the catalyst is a tetraalkylammonium salt.
In some embodiments, an tetraalkylammonium salt is a basic tetraalkylammonium salt.
The preferred quaternary ammonium salts are tetraalkylammonium halides e . g.
In an embodiment, tetraalkylammonium chloride is used with ammonium fluoride.
In some embodiments, the bicarbonate salt is a tetraalkylammonium bicarbonate.
In some instances, the tetraalkylammonium halide is tetrabutylammonium iodide.
In some embodiments, the phase transfer catalyst is a tetraalkylammonium salt.
Preferably a solution of ammonia, tetraalkylammonium hydroxide or mixtures thereof are used.
The tetraalkylammonium salts can be prepared using various procedures,.
Preference is given to a ammonia hydroxide or a tetraalkylammonium solution, or mixtures of them.
Gellan of tetraalkylammonium salts can be retained by freeze-drying the eluate.
The hydroxylamine is deprotected, sulfated and converted to a tetraalkylammonium salt.
Of the aforementioned examples, the tetraalkylammonium hydroxides are especially desirable.
The process of claim 1, wherein the organic structuring agent is a tetraalkylammonium.
In some embodiments, the tetraalkylammonium salt is a basic tetraalkylammonium salt.
An aqueous composition according to claim 2, wherein the composition comprises tetraalkylammonium ions.
The process of claim 19 wherein the tetraalkylammonium chloride is tetramethylammonium chloride.
Tetraalkylammonium salt of acidic polysaccharide can be obtained by freeze-drying the eluate.
In the context of the present invention, tetraalkylammonium hydroxides are especially preferred.
