Prediction of retention indexes. III. Silylated derivatives of polar compounds.
Polar compounds containing hydroxyl, amino and carboxyl groups, singly or in combination, can be chromatographed after the polar functional groups are silylated. The silylated derivatives of acids, alcohols, amines, diols, amino alcohols, amino acids are shown to behave chromatographically as hydrocarbons, and their retention indexes can be readily predicted from their base values. The column difference, namely, the difference between the retention indexes of the analyte on polar and non-polar columns is minimal for the silylated derivatives in comparison to that observed for the underivatized analytes. This minimal column difference is attributed to the hydrocarbon-like chromatographic characteristics of the silylated derivatives. The retention indexes of the silyl derivatives appear to correlate with the atom number Z of the analyte.
Peng
C T
CT
Department of Pharmaceutical Chemistry, School of Pharmacy, University of California, San Francisco 94143-0446.
Yang
Z C
ZC
Maltby
D
D
D000143:Acids / Q000737:chemistry; D000438:Alcohols / Q000737:chemistry; D000588:Amines / Q000737:chemistry; D000596:Amino Acids / Q000737:chemistry; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D002849:Chromatography, Gas; D015394:Molecular Structure; D017646:Organosilicon Compounds; D004364:Pharmaceutical Preparations / Q000737:chemistry*; D012825:Silicon; D014297:Trimethylsilyl Compounds
D000143:Acids; D000438:Alcohols; D000588:Amines; D000596:Amino Acids; D017646:Organosilicon Compounds; D004364:Pharmaceutical Preparations; D014297:Trimethylsilyl Compounds; C009660:t-butyldimethylsilyl compounds; D012825:Silicon