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Binding constants (M−1) for the 1:1 complexes between (R,R)-12 or (R,R)-1 and dicarboxylate anions in CDCl3.a
| Entry | Macrocycle | Succinate | Glutarate |
| 1 | (R,R)-12 | 34 ± 3 | 21 ± 13 |
| 2b | (R,R)-1 | n. d. | 30 ± 12 |
aMeasured by 1H NMR (500 MHz, 298 K, CDCl3) using tetrabutylammonium salts. bData taken from Ref. [31]; n. d. = not determined.
