摘要:
The beta-diketiminate lithium salts [(LLi)-Li-1, L-1 = PhNC(Me)CHC(Me)NPh; (LLi)-Li-2, L-2 = p-ClPhNC(Me)CHC(Me)NPh(2,6-Pr-2(i))] reacted with anhydrous LnCl(3) (Ln = Sm, Yb) in 1: 1 molar ratio in THF to afford the new heteroleptic lanthanide complexes L(1)LnCl(2)(THF)(2) (Ln = Sm (1), Yb (2)) and L(2)LnCl(2)(THF)(2) (Ln = Sm (3), Yb (4)) in high yields. The substituents on the arene ring have significant effect on the solubility of these complexes. Crystal structure analysis revealed that complexes I and 3 are both monomeric, in which the samarium atom is coordinated by two nitrogen atoms of the beta-diketiminate ligand, two chloro and two THF ligands in distorted octahedral environment. (C) 2002 Elsevier Science Ltd. All rights reserved.