. Author manuscript; available in PMC: 2008 Sep 12.

Published in final edited form as: Inorg Chem. 2007 Jun 1;46(13):5260–5270. doi: 10.1021/ic0702926

Table 1.

The protonation constants of ligand 1 as determined by potentiometric titration at 25°C in either 1.0 M Me₄NCl or KCl. The correlation coefficients of these determinations are examined in the Supplementary Information (S4).

	1.0 M Me₄NCl	1.0 M KCl
log K₁^H	9.97 ± 0.03	8.78 ± 0.03
log K₂^H	7.84 ± 0.05	7.69 ± 0.03
log K₃^H	7.44 ± 0.04	7.21 ± 0.04
log K₄^H	7.01 ± 0.04	6.66 ± 0.04
log K₅^H	6.50 ± 0.04	6.17 ± 0.04
log K₆^H	5.91 ± 0.03	5.44 ± 0.04
log K₇^H	2.46 ± 0.04	2.17 ± 0.05
log K₈^H	1.92 ± 0.03	1.1 ± 0.1