摘要:
The coordination properties of the Schiff base ligand N,N'-ethylenebis(acetylacetoneimine) (H(2)acacen), were investigated with a range of lanthanoid nitrate hexahydrate salts yielding [Ln(NO3)(3)(H(2)acacen)(2)][C6H12](n) (Ln = La, Pr, Nd and Sm), and X-ray crystallographic characterisation revealed that the early lanthanoids all adopt the same polymeric structure with a single, bidentate H2acacen ligand attached to each metal centre and two monodentate H(2)acacen ligands bridging between successive metal centres resulting in a polymeric array. In a similar reaction, Yb(NO3)(3).6H(2)O induced decomposition of H(2)acacen resulting in isolation of the new complex [Yb(H2O)(2)(NO3)(2)(mu-NO3)(acac)](2). (C) 2002 Elsevier Science Ltd. All rights reserved.