[en] Full text: The new organic ligands -N-(5-clorasalicylidine)-β-athanol (HL'1), N(-5-bromosalicyliden)-β-alanine (H₂L³), N(-2-hydroxy-5-bromobenzyl)-β-alanine (H₂L⁴), N-(5-bromosalicylidene) qlycibe (H₂L⁵) have been obtained. The new lanthanide complexes (Y, La,Ce,Nd,Sm,Er,Lu) with N-(2-hyroxy-5-brombenzyl)-β-alanine (H₂L⁴) have been prepared and studied. The elemental analyses, IR-spectra and thermo gravimetric data point out on the following composition of the obtained compounds: Ln(L)(X)(H₂O)n (where L=N-(2-hydroxy-5-brombenzil)-β-alanine (H₂L⁴), X=CH3COO-, NO3-, Br-, n=3,4). IR spectra's indicate on bi- or polynyclear structure of complexes