Synthesis and Crystal Structure of a Novel Ion-pair Complex of Li(THF)_4Nd(C_8H_8)_2·2THF

摘要

The reaction of NdCl3 with lithium methylnaphthalene in 1:2 mole ratio in THF generates black powder.The powder reacts with cyclooctatetraene（COT）in THF to form the title complex.[Li（THF）4Nd（C8H8）2]·2THF crystallizes in the monoclinic space group P2/c with unit-cell dimensions a=1.7858（7）nm,h=1.3243（4）nm,c=1.8086（6）nm.β=106.52（4）°,V=4.10 nm3 and Dc=1.268 g/cm3 for Z=4.F（000）=1660,R=0.0774,Rn=0.0733.The complex consists of discrete ion-pair and two THF moleculesadduct.In the anion,the neodymium atom is coordinated by two COT rings.The structure of the cation showsthat the lithium atom is attached with THF molecules only.