PREPARATION OF LANTHANIDE-(III) NEUTRAL COMPOUND LIGANDS IN THE LN(CH3COO)(3)-HDEHP-DECANE SYSTEM AND STUDY OF THEIR SOLUBILITY IN HDEHP-DECANE SOLUTIONS

Investigations have resulted in the development of synthesis procedure s and the synthesis of solid compounds of Pr, Nd, Sm, Eu, Gd, Tb, Ho, Er, Yb and Lu in Ln(CH3COO)(3)-HDEHP-decane systems. Based on the resu lts of chemical analysis and IR spectroscopy data it was concluded tha t the compounds are neutral mixed ligand complexes, the composition of which corresponds to the formula LnA(n)(CH3COO)(y) (where y = 3 - n). Di-(2-ethylhexyl)phosphatoacetates are of polymeric structure. The la nthanides of solid compounds are assumed to have coordination number 6 . A scheme for the molecular structure of these compounds is proposed. The solubility of di-(2-ethylhexyl)phosphatoacetates in HDEHP-decane solutions has been studied and the composition of the extracted comple xes was specified by the solubility method. (C) 1998 Published by Else vier Science S.A.