Koordination compounds of rare earth elements with thiosemicarbazidediacetic acid

Coordination compounds of lanthanides with thiosemicarbazide diacetic acid (H2L) of the LnLXxnH2O (X=Cl, Br, OH), Na([LnL2]x2H2O composition are synthesized. The IR obsorption spectra of extracted matters, electron-oscillatory spectra, luminescence spectra of europium complexes and NMR spectra of LnLCLxnH2O composition compounds, where Ln=Eu, Ho, Yb, are studied. It is shown that H2L behaves itself as a polydentate ligand with (O, O, N, N) donor atoms