Syndiospecific polymerization of propylene: 2-substituted and 2,7-substituted metallocene complex of the (C(13)H(8-n)R(n)CR(n)(')C5H4)MCl(2) (n=1,2; R=alkoxy, alkyl, hal; R(')=Me, Ph; M=Zr, Hf)

Seventeen new catalyst. precursors for the syndiospecific polymerization of propylene are presented. The new metallocene complexes are substituted in the positions 2 and 7 of the fluorenlidene fragment by MeO-, halogen-, alkyl- and aryl groups. The focus is directed on effective new synthetic routes to substituted fluorenes and the preparation of Be catalyst precursors. In addition first polymerization results are reported.