Premium
Messkette zur direkten potentiometrischen Bestimmung des Enantiomerenüberschusses von 1‐Phenyläthylmmonium‐Ionen
Author(s) -
Bussmann Walter,
Morf Werner E.,
Vigneron JeanPierre,
Lehn JeanMarie,
Simon Wilhelm
Publication year - 1984
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19840670603
Subject(s) - chemistry , enantiomer , enantiomeric excess , potentiometric titration , aqueous solution , medicinal chemistry , ion , stereochemistry , organic chemistry , enantioselective synthesis , catalysis
Cell Assembly for the Potentiometric Determinatin of the Enantiomeric Excess of 1‐Phenylethylammonium‐Ions A cell assembly with two membranes containing each one enantiomer of the ionophor N , N , N ′, N ′, N ″, N ″, N ‴, N ‴‐octabutyl‐1,4,7,10,16‐hexaoxacyclooctadecane‐2,3,11,12‐tetracarboxamide is used for the direct potentiomewtirc determination of the enantiomeric excess ee of 1‐phenylethylammonium ions in aqueous solutions. The preference for the ( R )‐over the ( S )‐1‐phenylethylammonium ion by the (2 R ,3 R ,11 R ,12 R )‐ionophor of 2.7 allows a reliable determination of ee even in the presence of known concentrations of the heavy interferent KCl.