A new route to planar-chiral cyclopentadienyl-iron(II) and -rhodium(I) complexes

Abstract

Diastereoisomerically pure planar-chiral cyclopentadienyl-metal complexes, 3 and 4, are prepared by the reaction of the cyclopentadiene 2 having a (–)-menthyl group with FeCl2 or [Rh(cod)Cl]2(cod = cylcloocta-1,5-diene); removal of the (–)-menthyl group from 4 affords the first optically pure enantiomers, (+)-5 and (–)-5.