Stereoselective Formation of C2-Symmetric ansa-Lanthanocenes by Reductive Coupling of Acenaphthylene with Activated Ytterbium or Samarium
摘要:
A fulvene-type coupling results from the reduction of acenaphthylene by activated samarium or ytterbium in THF. This leads exclusively to the formation of the respective C2 -symmetric trans-rac-ansa-lanthanocene complexes [(η5 -C12 H8 )2 Ln(thf)2 ] [Eq. (1); Ln=Sm, Yb].