Metallocenes having benzo-fused indenyl derivatives as ligands,

Organic compounds -- part of the class 532-570 series – Organic compounds – Heavy metal containing

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556 11, 556 12, 556 22, 556 27, 556 28, 556 23, 556 43, 556 53, 556 58, C07F 1900, C07F 1700, C07F 1100, C07F 700

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054553660

ABSTRACT:
Metallocenes having benzo-fused indenyl derivatives as ligands, processes for their preparation and their use as catalysts A very effective catalyst system for olefin polymerization comprises a cocatalyst, preferably an aluminoxane, and a metallocene of the formula I ##STR1## in which, preferably, M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are halogen or alkyl, R.sup.3 is alkyl, R.sup.4 to R.sup.10 are alkyl or hydrogen and R.sup.11 is a (substituted) alkylene or heteroatom bridge.

REFERENCES:
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patent: 5103030 (1992-04-01), Rohrmann et al.
patent: 5324800 (1994-06-01), Welborn, Jr.
Ewen, J. A., et al, J. Am. Chem. Soc. 109:6544-6545 (1987).
J. Am. Chem. Soc. 108:179-181 (1986).

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