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. Author manuscript; available in PMC: 2010 Nov 4.
Published in final edited form as: J Am Chem Soc. 2009 Nov 4;131(43):15815–15824. doi: 10.1021/ja906230n

Figure 1.

Figure 1

The dependence on pD of (δH)obsd (ppm), the chemical shift of the methine hydrogen of the imines formed in D2O that contains: (●), 0.1–2.0 M glycine and 5–20 mM 1; and (▲), 0.1–0.5 M glycine and 5–10 mM 2 at 25 °C and I = 1.0 (KCl). The solid lines show the fit of these data to eq 5 derived for Scheme 1 (●), or to eq 6 derived for Scheme 2 (▲).