Examples of 'positional isomers' in a sentence
Meaning of "positional isomers"
positional isomers - In chemistry, positional isomers are compounds that have the same molecular formula and the same functional groups, but differ in the position of those groups within the molecule
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- plural of positional isomer
How to use "positional isomers" in a sentence
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positional isomers
Six positional isomers are possible for dinitrotoluene.
The present invention comprises all positional isomers.
Positional isomers are also called regioisomers.
Minor amounts of the other positional isomers were also found.
Positional isomers may have different retention time.
Isolation or enrichment of specific positional isomers is both difficult and expensive.
Positional isomers may also be embraced by the compounds of the invention.
The desired isomer should be separable from the undesirable positional isomers using conventional techniques.
Several positional isomers can be distinguished.
NMR for the discrimination of positional isomers.
It is recognized that positional isomers of these copolyols can be achieved.
Predicted NMR splitting patterns of mephedrone and its positional isomers.
The positional isomers thereof.
It is possible to use NMR spectroscopy to assist in the discrimination of positional isomers.
Separation of the positional isomers is by standard column chromatography on silica gel.
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Compound 1 exists as a mixture of positional isomers.
All other positional isomers may be prepared in a similar manner to those transformations described above.
Separation or preparation of positional isomers or geometrical isomers ;.
Positional isomers are also possible because of the variable substitution in the triphendioxazine ring skeleton.
In addition, geometric and positional isomers are also described.
It is difficult to separate the 4-cyclopentyl resorcinol from its positional isomers.
OLLn and the positional isomers OLnL and LnOL.
In addition, the present description embraces all geometric and positional isomers.
PoOLn and the positional isomers OPoLn and OLnPo.
In addition, the present invention embraces all geometric and positional isomers.
PLLn and the positional isomers LLnP and LnPL.
In addition, the present invention contemplates all geometric and positional isomers.
PPoLn and the positional isomers PLnPo and PoPLn.
In practice, the reaction conditions provide a mixture of polymer-IFN positional isomers.
The following positional isomers are also isolated during purification,.
In addition, the present disclosure embraces all geometric and positional isomers.
These positional isomers may be separated by standard procedures, such as column chromatography.
Chromatographing said tyrphostin through a matrix, thereby separating positional isomers of said tyrphostin ;.
Therefore, individual positional isomers are low in production yield and difficult to isolate and purify.
In addition, the compounds described herein embrace all geometric and positional isomers.
While positional isomers may be produced during synthesis, such isomers may be functionally equivalent.
Generally, the sulfonated phthalocyanines are not pure substances, but complex mixtures of different positional isomers.
Trimethoxyphenethylamines ( TMPEA ) are a group of positional isomers of the psychedelic cactus alkaloid mescaline.
This invention contemplates all racemic mixtures, pure enantiomers, as well as geometric and positional isomers.
Positional isomers of PC have different TG-LC.
In addition, unless otherwise specified, the present invention embraces all geometric and positional isomers.
No formation of trans - isomers or positional isomers of fatty esters ;.
The formulation of claim 7, wherein said PEG-interferon alpha conjugates comprise a mixture of positional isomers.
A graphical representation of the 9 pegylated-interferon alpha 2a positional isomers isolated and characterised is given in Figure 9.
Unless otherwise specified, they comprise from 1 to 10 carbon atoms and include all possible positional isomers.
PPoLn with 2 positional isomers.
For greater clarity, the term " possible isomers " shall not include positional isomers.
OLLn with 2 positional isomers.
Thus, 4 MMC can be easily discriminated from its positional isomers.
PLLn with 2 positional isomers.
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Examples of using Isomers
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Pure samples of the isomers are hard to obtain
Isomers of hch in the aquatic environment adopted
The more desirable isomers were selected or synthesized
