The novel bis-heterocyclohexadienyl metallocene complexes
 [Fe(η
   5
 -C
   5
 H
   5
 EMe
   2
 )
   2
 
 ] (E = Si, Sn) are prepared by reaction of anhydrous
 FeCl
   2
  with the appropriate lithium salt;
 [Fe(η
   5
 -C
   5
 H
   5
 SnMe
   2
 )
   2
 
 ] undergoes a further unusual reaction with CHCl
   3
  to
 displace one SnMe
   2
  fragment and afford the mixed sandwich
 complex
 [Fe(η
   5
 -C
   5
 H
   5
 SnMe
   2
 )(η
 
   6
 -C
   6
 H
   6
 )]
   2
 [Fe
   2
 Cl
 
   6
 ].
                                    新型双环
己二烯茂
金属络合物[Fe(δ- 5 -C 5 H 5 
EMe 2 ) 2 ](E = Si,Sn)是通过无
水氯化
铁 2 与适当的
锂盐反应制备的;
 [Fe(Î- 5 -C 5 H 5 SnMe 2 ) 2 ]与 CHCl 3 发生进一步的非正常反应,置换出一个 SnMe 2 片段,得到混合夹心复合物 [Fe(Î- 5 -C 5 H 5 SnMe 2 )(Î- 6 -C 6 H 6 )] 2 [Fe 2 Cl 6 ]。