摘要
The synthesis and X-ray crystal structure of triindenyl or trisubstituted indenyl lanthanoid have been reported, however the molecular structure ofdiindenyllanthanoidchloride has not been published. We have found out that [（C<sub>9</sub>H<sub>7</sub>）<sub>2</sub>PrClTHF]<sub>2</sub>（Ⅰ）can be isolated by the reaction of anhydrous PrCl<sub>3</sub> and 2 moles of NaC<sub>9</sub>H<sub>7</sub> in THF at the moderate high temperature for a long reaction time. The molecular structure of （Ⅰ） has been deter-
