Figure 2
pH* dependence of the various 1H resonances for the nonlabile protons (pH* refers to the uncorrected pH-meter reading in D2O for an electrode calibrated in H2O). The observed resonances (δobs) are shown as closed circles: H1 (black), H2 (blue) and H3 (red). The lines were calculated [minimization of Σ(δobs − δcalc)2]. Inset: The pattern of H1 at (i) pH* = 5, (ii) pH* = 10 and (iii) in 5 mol l−1 NaOD. |