Bis- and tris(pyrazolyl)borate metal complex catalysts

摘要

Metal complexes of the formula (I) or (I') are suitable for the oligomerization and polymerization of olefinically unsaturated compounds and for the copolymerization thereof with carbon monoxide ##STR1## M is a metal from sub-group eight of the Periodic Table of the Elements, E is an element from main group five of the Periodic Table of the Elements, P PR.sup.1 to R.sup.11, R.sup.15 are substituents selected from the group consisting of hydrogen, C.sub.1 - to C.sub.30 - organocarbon radicals and C.sub.3 - to C.sub.30 -organosilicon radicals, andPPR. sup.12 to R.sup.14 are substituents selected from the group consisting of C.sub.1 - to C.sub.30 -organocarbon radicals and C.sub.3 - to C.sub. 30 -organosilicon radicals.