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Merck Patent Gesellschaft

Karin Weiss

Ludwig Pohl

Herbert Schumann

Eike Poetsch

Hans-Ludwig Hirsch

Karl-Heinz Thiele

Stefan Schutte

Elmar Hecht

Thomas Metzner

Eva Maria Auth

Michael Frick

Bernd Heymer

Konrad V Werner

Corinna Wassermann

Fike Poetsch

Ulf D&uuml;michen

Aluminum alkyl complexes as cocatalysts

Coordination catalyst systems comprising intramolecularly stabilized

The invention relates to the use of cyclic organometallic compounds as components in coordination catalyst systems, to corresponding coordination catalyst systems and also to processes for the preparation of polymers by coordination polymerization and of unsaturated hydrocarbons by catalyzed metathesis of alkenes and alkynes using such coordination catalyst systems.

Coordination catalyst systems

A process is described for the reaction of at least one partly fluorinated alkene with catalysts containing tungsten complex compounds, at 10.degree. to 200.degree. C., if appropriate in the presence of at least one inert solvent. A mixture of a partly fluorinated alkene with another partly fluorinated alkene or with a non-fluorinated alkene can also be employed for the reaction. Longer-chain partly fluorinated compounds are thereby obtained which contain at least one internal C.dbd.C double bond. Ethylene or a short-chain alkene is furthermore produced and is separated off from the reaction mixture. The longer-chain partly fluorinated compounds are valuable intermediates and can be hydrogenated to give, for example, highly heat-resistant special lubricants.

Process for the metathesis of partly fluorinated hydrocarbons

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Bayreuth, Germany

Karin Weiss