Synthesis and Crystal Structure of β-Diketiminate Ytterbium Dichloride

The reaction of anhydrous YbCl3 with lithium β-diketiminate, LLi (L=N,Ndiphenyl-2,4-pentanediimine anion), in 1:1 molar ratio in THF gave rise to the title complex LYbCl2(THF)2 1 which has been characterized by single-crystal X-ray diffraction. It crystallizes in the orthorhombic system, space group Pna21(#33) with a=19.657(8), b=9.581(4), c=14.107(6) A,V=2656.8(18) A3, Z=4, C25H33N2O2Cl2Yb, Mr= 637.49, Dc=1.594 g/cm3, F(000)=1268.00 and μ (MoKα)=3.744mm- 1. The final R and wR are 0.031 and 0.073 for 2596 observed reflections with I ＞ 2σ(I), respectively. The X-ray crystal structure analysis revealed that the center ytterbium(Ⅲ) is bonded to two chloride anions, two oxygen atoms from two tetrahydrofuran molecules and one chelate ligand β-diketiminate to form a six-coordinate distorted octahedral geometry.