Basf Aktiengesellschaft

Basell Polyolefine Gmbh

Udo Handrich

Shahram Mihan

Dieter Lilge

Martin Schneider

Paulus De Lange

Markus Enders

Ursula Rief

Johannes Hack

Gunter Ludwig

Ralph Rudolph

G&uuml;nther Schweier

Günther Schweier

Wolfgang Rohde

Substituted monocyclopentadienyl, monoindenyl, monofluorenyl or heterocyclopentadienyl complexes of chromium, molybdenum or tungsten, wherein at least one of the substituents of the cyclopentadienyl ring carries a rigid donor function which is not exclusively bonded through sp-hybridized carbon or silicon atoms, and a process for polymerizing olefins.

Monocyclopentadienyl complexes of chromium, molybdenum or tungsten with a donor bridge

Substituted monocyclopentadienyl, monoindenyl, monofluorenyl and heterocyclopentadienyl complexes of chromium, molybdenum or tungsten in which at least one of the substituents on the cyclopentadienyl ring carries a donor function which is bonded rigidly, not exclusively via sp-hybridized carbon or silicon atoms, and a process for the polymerization of olefins.

Monocyclopentadienyl complexes of chromium, molybdenum or tungsten

Substituted monocyclopentadienyl, monoindenyl, monofluorenyl and heterocyclopentadienyl complexes of chromium, molybdenum or tungsten in which at least one of the substituents on the cyclopentadienyl ring carries a donor function which is bonded rigidly, not exclusively via sp -hybridized carbon or silicon atoms, and a process for the polymerization of olefins.

Metallocenes are prepared by a process in which a metal salt is reacted with at least one alkali metal and with an unsaturated, cyclic hydrocarbon in the presence of a solvent in one reaction step.

Preparation of metallocenes in one reaction step

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Udo Handrich