Patent ID: 6284697
Filing Date: 2001-09-04
Classification: B01J,C08F

Abstract:
A catalyst comprising allyl complexes of the rare earths of formula (I)[(C.sub.3 R.sup.1.sub.5).sub.r M.sup.1 (X).sub.2-r (D).sub.n ].sup..sym. [M.sup.2 (X).sub.p (C.sub.6 H.sub.5-q R.sup.2.sub.q).sub.4-p ].sup..crclbar. (I)wherein:M.sup.1 denotes a trivalent element of the rare earths of atomic numbers 21, 39, 57 to 71, X is the same or different and denotes an anion, D is the same or different and denotes a neutral donor ligand, M.sup.2 represents an element of group IIIb of the periodic table of the elements, R.sup.1 is the same or different and represents hydrogen, a linear or branched, saturated or singly- or multiply-unsaturated C.sub.1 -C.sub.30 alkyl radical or C.sub.5 -C.sub.30 cycloalkyl radical which may optionally contain one or more hetero atoms a C.sub.6 -C.sub.30 aryl radical which may optionally contain one or more hetero atoms, which is optionally singly- or multiply-substituted by alkyl, alkynyl or alkenyl radicals comprising 1 to 30 carbon atoms or by phenyl groups comprising 6 to 30 carbon atoms and which can be condensed with other aromatic compounds containing 6 to 30 carbon atoms, or represents a silyl group which is substituted by alkyl, alkenyl or alkynyl groups comprising 1 to 30 carbon atoms or by phenyl groups comprising 6 to 30 carbon atoms, R.sup.2 is the same or different and represents a fluorine atom or a fluoroalkyl group comprising 1 to 10 carbon atoms, n represents an arbitrary number from 0 to 10, p represents an arbitrary number from 0 to 3, q represents an arbitrary number from 1 to 5, r represents an arbitrary number from 1 to 2.