Synthesis and Crystal Structure of Bis(N,N'-cyclohexyl-N'-bis(trimethylsilyl)samarium Chloride

摘要

The reaction of [(SiMe3)2NC(NC6H11)2]Li with SmCl3 in 2:1molar ratio in THF gave bis(N,N'-cyclohexyl-N''-bis(trimethylsilyl)samarium chloride,[(SiMe3)2NC(NC6H11)2]Sm(μ-Cl)2Li(THF)2 1 in 85% isolated yield as pale-yellow crystals.Complex 1 was structurally characte- rized by single-crystal X-ray diffraction analysis at 289(2) K.It crystallizes in monoclinic,space group C2/c with a=26.886(3),b=13.677(2),c=19.465(3)A,β=120.26(1)°,V=6182(2)A3,Z=4,Mr=1105.84,Dc=1.188g/cm3,F(000)=2340 and μ(MoKα)=1.150 mm-1.The structure was refined to R=0.0378 and wR=0.0885 for 4342 observed reflections with I>2σ(I).The coordination geometry of samarium ion can be best described as a distorted pseudooctahedron.