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. Author manuscript; available in PMC: 2010 Dec 1.
Published in final edited form as: Chemistry. 2009 Dec 7;15(47):13188–13200. doi: 10.1002/chem.200901095

Table 4.

Stability constants for the metal complexes formed with DOTA and DOTA-(gly)4 (1.0 M KCl and 25 °C)

Metal (M) DOTA-(gly)4[39] DOTA
ML MLH MLH2 MLH3 MLH4 M2L MLH−1 ML MLH MLH−1
Mg2+ 4.34 - - - - - - 11.92[44] 4.09[44] -
Ca2+ 10.39 4.23 3.98 3.96 3.00 - - 17.23[44] 3.54[44] -
Cu2+ 13.39 4.38 3.35 3.46 - - 9.18 22.25[45] 3.78[45] -
Zn2+ 12.97 (2) 4.16 (2) 3.70 (2) 3.00 (2) - - 9.49 (6) 21.10[45] 4.18[45] -
CeIII 13.02 3.38 3.09 2.38 1.90 - - 23.4[46] - -
NdIII 14.55 3.27 3.02 2.29 1.70 - - 23.0[46] - -
EuIII 14.84 3.45 2.96 2.40 1.90 - - 23.5[46] - -
TbIII 14.54 3.38 2.87 2.40 - - - 24.7[46] - -
YbIII 14.25 3.07 3.05 - - - - 25.0[46] - -