Table 1
| Anion Addeda,b |
Compound 1 (M-1) |
Compound 2 (M-1) |
| Fluoride |
17200 (± 900) |
3600 (± 400) |
| Chloride |
350 (±5.5) |
120 (±4.0) |
| Bromide |
10 (±0.5) |
not determined |
| Iodide |
< 10 |
not determined |
| Dihydrogen phosphate |
97 (±3.9) |
<10 |
| Hydrogen sulfate |
< 10 |
not determined |
Table 1 Stability constants for compounds 1 and 2 with anionic substratesa in CD2Cl2 at 298K.
Footnotes to Table 1
aAnions were added as 0.1 M CD2Cl2 solutions of their tetrabutylammonium salts to receptor to 10 mM solutions of the receptor in CD2Cl2 with concentration changes being accounted for by EQNMR. In determining the stability constants, the possible effects of ion pairing (if any) were ignored.