Modern resolution-enhanced NMR techniques can monitor the in-situ discrimination of co-existing isotropic and anisotropic contributions of small molecules dissolved in weakly aligning PMMA/CDCl3 media. The simultaneous sign-sensitive determination of accurate Δδ(1H) and Δδ(13C) between isotropic and anisotropic signals, and/or 1TCH and 1JCH coupling constants (and consequently 1H-13C RDCs and 1H/13C RCSAs) can be performed from spectral-aliased HSQC spectra.
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