Synthesis and Characterisation of Lanthanide Thiourea Simple and Mixed Complexes using Urea, N-Phenylurea and N, N´ -Diphenyl-Urea as Secondary Ligands

Abstract

Simple lanthanide complexes of the type [Ln(L)₅(Cl]Cl₂.2H₂O and mixed complexes of the type [Ln(L)₅(L´)₃Cl]Cl₂.nH₂O where Ln ═ Y(III), La(III), Pr(III), Nd(III), Sm(III), Gd(III), Dy(III), L ═ thiourea, L´ ═ urea, N-phenylurea or N, N´-diphenylurea have been prepared and characterised by a study of u.v., visible and i.r. spectra, thermal analysis and conductivity measurements.