Overall Formation Constants of Coordination Compounds

Halo Complexes
AlF63- 1 x 1020
AgCl2- 3 x 105
AgCl43- 5 x 106
HgCl42- 5.0 x 1015
AgBr43- 8 x 109
CdBr42- 6.0 x 103
HgBr42- 1.0 x 1021
PbBr42- 1 x 104
AgI43- 1.0 x 1014
CdI42- 2.5 x 106
HgI42- 1.9 x 1030
PbI42- 1.6 x 106
Amine Complexes
Co(NH3)62+ 5.0 x 104
Co(NH3)63+ 4.6 x 1033
Ni(NH3)62+ 2.0 x 108
Cu(NH3)2+ 7.2 x 1010
Cu(NH3)42+ 1.1 x 1013
Ag(NH3)2+ 1.6 x 107
Zn(NH3)42+ 2.8 x 109
Cd(NH3)42+ 3.0 x 107
Cyano Complexes
Cu(CN)43- 2.0 x 1030
Ni(CN)42- 1.0 x 1022
Fe(CN)63- 1.0 x 1031
Fe(CN)64- 1.0 x 1024
Ag(CN)2- 1.0 x 1020
Cd(CN)42- 5.9 x 1018
Hg(CN)42- 3.0 x 1041
Zn(CN)42- 1.0 x 1017
Other Complexes
AgI43- 1.0 x 1014
Ag(C2O4)- 2.8 x 102
Fe(C2O4)33- 4.0 x 1021
Al(C2O4)33- 2.0 x 1016
HgS22- 3.5 x 1054
Fe(NCS)2+ 1.1 x 103
Hg(NCS)42- 7.8 x 1021
Pb(C2H3O2)42- 1.0 x 103
Cu(en)22+ 4.0 x 1019
Ni(en)32+ 3.0 x 1018
Co(en)32+ 8.7 x 1013
Co(en)33+ 4.9 x 1048
Ca(EDTA)2- 1.0 x 1011
Mg(EDTA)2- 4.4 x 108

Reference: Lange's Handbook, pps. 8-83 to 8-103; Sillen and Martell.