Two-dimensional NMR? A strange concept, when we consider that all the spectra we have previously dealt with were of course plotted in two dimensions, the two axes (dimensions) being a frequency axis (horizontal, expressed in ppm rather than in Hz for reasons we have already discussed) and an intensity axis. To understand the basic idea of two-dimensional NMR (2D NMR) we should first remind ourselves that while the spectrum we see and use is plotted as a function of frequency, it was originally recorded (as the FID) as a function of time. Only after the Fourier transformation did it become intelligible to us.
KeywordsPhosphorus Chlorine Deuterium Phosphine Phosphonates
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