Stability of bismuth(III), indium(III), lead(II), and cadmium(II) monocomplexes with selenourea and thiourea
摘要:
The stability constants of the bismuth(III), indium(III), lead(II), and cadmium,(II) monocomplexes with selenourea (seu) and thiourea (tu) were determined spectrophotometrically at the ionic strength 1 (0.5 mol/L HClO(4) + NaClO(4)) or 2 (1 mol/L HClO(4) + NaClO(4)) and 276 and 298 K. For all metals, the stability constants (beta(1)) of the complexes with seu were higher than those of the complexes with tu and changed in the series Bi(3+) > Cd(2+) a parts per thousand In(3+) > Pb(2+). A correlation between log beta(1)(S) and log beta(1)(Se) was established.