Complexing of cadmium with diethylene-triamine-N, N, N', N'', N''-pentamethylphosphonic acid

Obtained are protonized cadmium complexes with diethylenetriamine-N,N,N',N'',N''-pentamethylphosphonic acid (DTPPA) of the composition 1/1. The complex dissociation constants are determined using potentiometric and polarographic methods and are presented in the table. Taking into consideration, that the solution composition when constant determination by the two methods was not fully identical, the deviation in constant values of complex dissociation is not unexpected