![]() ![]() Essentially, the projection along f2 is a decoupled proton spectrum, which greatly simplifies the spectrum and allows students to quickly identify the chemical shift and coupling pattern.Ĭomparison of the JRES spectrum with the 1D proton spectrum allows students to understand how proton-proton coupling affects the appearance of the spectrum and become more confident at distinguishing between multiplets and different resonances. the chemical shift along one axis (f2) and the proton-proton coupling along the other axis (f1). ‘JRES’ is a 2D homonuclear experiment that produces a J-resolved spectrum, i.e. For a novice at interpreting proton NMR spectra, it can be difficult to distinguish between separate resonances and multiplets belonging to the same resonance. Many undergraduates that have been introduced to NMR understand the concepts of chemical shift and coupling, however struggle when presented with a real 1H NMR spectrum. ![]()
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