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Protonation constants for cis-UCA (L) and logarithmic complex formation constants for the interaction of Cu(II) ions with cis-UCA, together with the ascribed protonation events.
| Species | Logβ 1 | pK | Protonation Event |
|---|---|---|---|
| H2L | 9.541(6) | 2.80 | COOH |
| HL | 6.742(2) | 6.74 | NIm |
| CuL | 4.941(9) | COOH, NIm | |
| CuL2 | 8.76(1) | COOH, NIm |
1 Values determined by potentiometry at 25 °C and I = 0.1 M (KNO3). Standard deviations on the least significant digits, provided by HYPERQUAD [35] are given in parentheses.
