Table 3.

Overall stability constants for the complexes formed in the Fe(III)-Hisha system*; I = 0.2 M (KCl), t = 25°C.

Species	log β
[FeLH2]4+	21.98(6)
[Fe(LH2)2]5+	43.45(3)
[FeL2H3]4+	38.11(7)
[Fe(LH2)]3+	32.59(5)
[FeL2H]2+	25.81(9)
[FeL2]+	19.53(5)
[FeL2H−1]	12.05(5)
Number of points fitted	292
Fitting (cm3)	8.4⋅10−3

*Standard deviations are shown in parenthesis.