The enantiomer separation of 2-halocarboxylic acid esters on two chiral nickel(l1) bis-((perfluoroacy1)terpeneketonates) by complexation gas chromatography is described. The quantitative enantiomer separation of branched 2-halocarboxylic acid esters is achieved with nickel ( 11) bis (3-(heptafluorob
Enantiomeric separation of halocarboxylic acids by capillary gas chromatography
β Scribed by Koch, E. ;Nicholson, G. J. ;Bayer, E.
- Publisher
- John Wiley and Sons
- Year
- 1984
- Tongue
- English
- Weight
- 412 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0935-6304
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β¦ Synopsis
The direct determination of the enantiomeric purity of halocarboxylic acids is described. The method used involves gas chromatographic separation of the corresponding tert-butylamides on deactivated glass or fused-silica capillaries coated with Chirasil-Val. Both the influence of the amide moiety on enantiomeric resolution and tailing, and the r'acemization during formation of the amide derivatives were studied.
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The enantiomers of β£-phosphonosulfonic acids were completely resolved by capillary electrophoresis using β€-cyclodextrin as a chiral selector in a borate electrolyte and by HPLC using a chiral AGP column. The methods were used to quantitate the R-enantiomer present as an impurity in the S-enantiomer,