申请人:Bayer Aktiengesellschaft
公开号:US06423659B1
公开(公告)日:2002-07-23
&pgr;-complex compounds and in particular metallocene compounds of formula (Ia)(Ib),
in which &pgr;I and &pgr;II represent &pgr;-systems, D designates a donor atom and A designates an acceptor atom, D and A being linked by a reversible coordinative bond such that the donor group assumes a positive (partial) charge and the acceptor group assumes a negative (partial) charge, at least one of D and A being part of the associated &pgr;-system in each case, M stands for a transition metal of the 3rd, 4th, 5th or 6th subgroup of the (Mendelian) periodic system of elements, X designates an anion equivalent and n designates the number zero, one, two three or four depending on the charges of M and those of &pgr;I and &pgr;II, are novel and can be used as catalysts for the (co)polymerization of olefins, i-olefins, alkines and/or diolefins or for ring-opening polyaddition.
该复合物是一种公式(Ia)(Ib)的金属环化合物,其中&pgr;I和&pgr;II代表&pgr;-系统,D代表给体原子,A代表受体原子,D和A通过可逆的配位键连接,使得给体基团呈正(部分)电荷,受体基团呈负(部分)电荷,每种情况下至少有一个D和A是相关联的&pgr;-系统的一部分。M代表元素周期表中第三、四、五或六族的过渡金属,X代表阴离子当量,n代表数字0、1、2、3或4,取决于M和&pgr;I和&pgr;II的电荷,这些新型复合物可以用作烯烃、i-烯烃、炔烃和/或二烯的(共)聚合催化剂,或用于开环聚加反应。