Enantiodifferentiation through frequency-selective pure-shift (1)H nuclear magnetic resonance spectroscopy

Abstract

A frequency-selective 1D (1) H nuclear magnetic resonance (NMR) experiment for the fast and sensitive determination of chemical-shift differences between overlapped resonances is proposed. The resulting fully homodecoupled (1) H NMR resonances appear as resolved 1D singlets without their typical J(HH) coupling constant multiplet structures. The high signal dispersion that is achieved is then exploited in enantiodiscrimination studies by using chiral solvating agents.

Keywords: chemical shift; enantioselectivity; homodecoupling; nmr spectroscopy; single pulsed-field-gradient echo.