The novel C-1-symmetric zirconocene CpCpZrCl2 (Cp=C5H5, Cp*=1-neoment
hyl-4, 5, 6, 7-tetrahydroindenyl) is a cheap, active, and effective ca
talyst for the asymmetric ethylmagnesiation of unactivated terminal al
kenes. (C) 1998 Elsevier Science Ltd. All rights reserved.