Neodymium and europium picrate complexes with 3-picoline-N-oxide (3-picNO)

Neodymium and europium complexes with 3-picoline-N-oxide and formula Ln(pic )(3). 2(3-picNO). H2O were synthesized and characterized by elemental analy sis, IR absorption spectra, the visible absorption spectrum of the neodymiu m compound and the emission spectrum of the europium compound. The Eu compl ex, isomorphous with, the neodymium, crystallizes in space group P (1) over bar with Z = 4. There are two crystallographic non-equivalent Eu(III) ions . Both are coordinated to nine oxygen atoms in the form of a distorted mono capped square antiprism, where one of the square faces is bent. The differe nce between the two environments is that in one the cap is over the square plane, whereas in the other it is over the distorted face of the antiprism. (C) 1999 Elsevier Science S.A. All rights reserved.