Coordination properties of N-(Thio)phosphorylated thioureas and thioamides with respect to Co(II), Ni(II), Zn(II), and Cd(II) ions in solution

The acid-base and coordination properties of N-(thio)phosphorylated thioureas and thioamides R1C(X)NHP(Y)R 2 2, where X, Y = S, O (in various combinations); R1 = t-Bu, i-Pr, PhNH, Ph; R2 = (OPr-i), with respect to Co(II), Ni(II), Zn(II), and Cd(II) ions have been studied by pH-metry and UV spectrometry in an organic solvent. The pK values, the stability constants logβ and the maximum accumulated fractions of complex species in the solution have been calculated. © 2007 Pleiades Publishing, Inc