Studies on Rare Earth Complexes with Open－chain Crown Ethers（Ⅶ）──Preparation，Characterization and Structure of Rare Earth Complexes with N，N＇－Diethyltriglycollic Dianilide

Complexes[Ln(L)(Cl_2]Cl·3H_2O (Ln =La, Pr, Nd,Sm,Eu,Gd,Dy,Er and Lu)and[Lu(L)(H_2O)(NO_3 )_2]NO_3(L=N,N'-diethyltriglycollic dianilide)have been prepared in the nonaqueous medium,the new complexes of which have been characterized by means of elemental analysis,conductivity measurements,IR spectra,￣1H NMR spectra and TG-DTA techniques.In all the complexes,the organic ligand showed tetradentate behaviour.The structure analysis of [Lu (L) (H_2O) (NO_3 )_2]NO_3 showed that the lutetiurn atom is nine-coordinated by one tetradentate ligand , two bidentate nitrate groups and one water molecule with the following mean bond lengths:Lu O (etheric),0.2396;Lu O (carbonyl),0.2245;Lu O(nitrate),0.2397;Lu O(water),0.2296 nm.