Collect. Czech. Chem. Commun. 1993, 58, 798-805

Extraction of Complexes of Some Metals with 1,1-Disubstituted 3-Diphenoxythiophosphorylthioureas

Oldřich Navrátila, Eckhard Herrmannb, Nguyen Thi Thu Chaub, Channy Teab and Jiří Smolac

a Department of Special Chemistry, The Military College of Ground Forces, 682 03 Vyškov, Czech Republic
b Chemical Section, Luther University, 4020 Halle-Wittenberg, Germany
c Department of Inorganic Chemistry, Masaryk University, 611 37 Brno, Czech Republic


The extraction of complexes of silver, mercury, cadmium, cobalt, zinc, scandium and some rare earth elements (Ln) into benzene solutions of 1,1-disubstituted 3-diphenoxythiophosphorylthioureas (HA) containing alkyl and aryl substituents was examined using the radiotracer technique. The complexes AgA(HA), HgA2, CdA2 and LnA3 are extracted into the organic phase, and the extraction increases in order Co, Zn, Cd ≈ Ln << Hg < Ag. The extraction constants were calculated. During the extraction process using medium acidic aqueous phases (1 M HNO3), the reagents decompose into the corresponding amines and (PhO)2P(S)NCS.