A heteronuclear multiple quantum correlation (HMQC) experiment was used to correlate the 6Li and 15N chemical shifts of mixed aggregates of [6Li, 15N]lithium 2,2,6,6‐tetramethylpiperidide with [6Li]LiBr, [6Li]LiCl, and [6Li]lithium cyclohexenolate. Optimization of the experiment to spin systems containing more than one weak spin is discussed. The two‐dimensional correlations represent a substantial improvement in sensitivity and resolution relative to one‐dimensional methods.
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Gilchrist et al. (1992) studied this question.
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