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

摘要

Complexes [Ln(L)(Cl_2]Cl · 3H_2O(Ln = La, Pr, Nd, Sm, Eu, Gd, Dy, Er and Lu) and [Lu(D (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 lutetium 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.