NMR enantiodifferentiation of quaternary ammonium salts of Tröger base
Copyright policy )NMR enantiodifferentiation of quaternary ammonium salts of Tröger base
AbstractHexacoordinated phosphorus BINPHAT anion 1 is an efficient NMR chiral solvating agent for quaternary ammonium cations (quats) derived from Tröger base leading to large separations of the proton signals of the enantiomers and even in polar solvent media such as CD3CN (ΔΔδ up to 0.12 ppm). Quite surprisingly, this efficacy in the NMR split efficiency is not translated into a supramolecular stereocontrol (Pfeiffer effect) of the cation configuration by the anion. Chirality 2009. © 2009 Wiley‐Liss, Inc.
- French National Centre for Scientific Research France
- University of Lille France
- Laboratory of Catalysis and Solid State Chemistry France
- Artois University France
- University of Geneva Switzerland
solvent effect, quaternary ammonium ions, Pfeiffer effect, Solvent effect, Troger base, 540, Asymmetric ion pairing, Quaternary ammonium ions, Tröger base, asymmetric ion pairing, [CHIM] Chemical Sciences, [CHIM]Chemical Sciences, NMR chiral solvating agent
solvent effect, quaternary ammonium ions, Pfeiffer effect, Solvent effect, Troger base, 540, Asymmetric ion pairing, Quaternary ammonium ions, Tröger base, asymmetric ion pairing, [CHIM] Chemical Sciences, [CHIM]Chemical Sciences, NMR chiral solvating agent
selected citations These citations are derived from selected sources.This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).29 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Top 10% influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Top 10% impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Top 10%
Citations provided by BIP!Popularity provided by BIP!