TANTALUM CATALYSTS FOR THE DIMERIZATION OF OLEFINS

This invention relates to novel organotantalum catalysts comprising tantalum and a silyl-substituted cyclopentadienyl moiety having the formula C5H5-x(SiR63)x, wherein each R6 may be the same or different and is hydrogen, alkyl, cycloalkyl, aryl, aralkyl or alkoxy, and x is an integer from 1 to 5. I...

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Bibliographische Detailangaben
Hauptverfasser:	DUBOIS, ROBERT A, SCHROCK, RICHARD R
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY GENERAL METHODS OF ORGANIC CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	This invention relates to novel organotantalum catalysts comprising tantalum and a silyl-substituted cyclopentadienyl moiety having the formula C5H5-x(SiR63)x, wherein each R6 may be the same or different and is hydrogen, alkyl, cycloalkyl, aryl, aralkyl or alkoxy, and x is an integer from 1 to 5. It also relates to a process for the selective dimerization of a 1-olefin to a dimer having a 1butene moiety whlch comprises contacting the 1-olefin with the novel organotantalum catalyst at a reaction temperature and pressure such that the dimer which is optionally substituted at the 2,3-carbon atoms is formed. The organotantalum catalysts of the present invention exhibit a higher activity towards the dimerization of 1-olefins than the known tantalum dimerization catalysts.