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NMR spectroscopy and ion pairing: Measuring and understanding how ions interact

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Academic year: 2021

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Figure

Fig. 1 Typical pulse sequences for the PGSE experiments: (a) the Stejskal–Tanner experiment; (b) the Stejskal–Tanner experiment, modified via substitution of two 90º pulses for a single 180º pulse.
Fig. 2 The dependence of the slope of the line (and thus the D values) on the size of the anion.
Table 1 D ( × 10 10 m 2 s –1 ) and r H (Å) values a in THF and Et 2 O at room temperature.
Fig. 3 Ion pairing and diffusion when the solvents have markedly different polarities.
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