While proton and carbon NMR (1D and 2D) data have been routinely incorporated in advanced chemistry laboratory experiments, students have traditionally had less exposure to other NMR-active nuclei.  This is likely in part due to the difficulty in the past of tuning the NMR spectrometer associated with heteronuclei.  These difficulties have been minimized with access to modern NMR instruments with autotuning capabilities.  With this in mind, we have developed several laboratory experiments that utilize NMR of nuclei including 59Co, 23Na, 31P, and 195Pt.  These laboratory experiments help to illustrate the importance of differing chemical shift ranges, the effect of isotopic abundance on spectral appearance, quadrupolar effects and asymmetry broadening, and heteronuclear coupling constants.  Most importantly, these experiments demonstrate the utility of NMR nucleus choice to best extract structural features from systems for which proton or carbon NMR may provide ambiguous information.

Heteronuclear NMR in advanced undergraduate laboratory courses: 59Co, 23Na, 31P, and 195Pt

243rd National Meeting (2012)

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