ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Synthesis and Extraction Ability of Some Polyether Bisthioureas and Ureas

L. Kniežo, J. Šťávorská, J. Bernát, J. Imrich, M. Buděšínský, and M. Bělohradský

Department of Organic Chemistry, Faculty of Natural Sciences, P. J. Šafárik University, CS-041 67 Košice

Abstract: For investigations of complexation properties, a series of bisthioureas in which the two thiourea groupings are linked with a polyether chain have been prepared by addition of amines to the corresponding isothiocyanates. The ability of the synthesized compounds to extract metal picrates from aqueous solutions was studied. It was found that, while all the thioureas extracted Ag⁺ and Cu²⁺ ions, only some bisthioureas extracted Pb²⁺ and Cd²⁺ ions, and some other bisthioureas also relatively well extracted Ca²⁺ ions. On reaction with 2,4,6-trimethylbenzonitrile oxide, the thioureas were converted into urea derivatives which, however, exhibited practically no extraction ability.

Full paper in Portable Document Format: 473a190.pdf

Chemical Papers 47 (3) 190–194 (1993)