Thermodynamic Investigation and Mixed Ligand Complex Formation of 1,4-Bis-(3-aminopropyl)-piperazine and Biorelevant Ligands

Table 1

Protonation constants of (BAPP) in aqueous solution at different temperatures (at 0.01 M ionic strength).

Temp. (°C)	log𝐾^𝐻1	log𝐾^𝐻2	log𝐾^𝐻3	log𝐾^𝐻4
20	10.41	10.01	7.09	2.78
25	10.25	9.87	6.99	2.74
30	10.1	9.73	6.91	2.71
35	9.99	9.6	6.81	2.66

log𝐾^𝐻₁, log𝐾^𝐻₂, log𝐾^𝐻₃ and log𝐾^𝐻₄ are the stepwise protonation constants.