Process for the preparation of copolymers, carbon monoxide with ethene and optionally also another olefinically unsaturated hydrocarbon in the presence of a novel catalyst composition comprising
a) a palladium compound,
b) an anion of an acid with a pKa of less than 4, with the proviso that the acid is not a hydrohalogenic acid, and
c) a nitrogen bidentate ligand of the general formula
wherein X and Y represent similar or different organic bridging groups, each containing three or four atoms in the bridge at least two of which are carbon atoms, and optionally,
d) an organic oxidant.
在一种新型催化剂组合物存在下制备
一氧化碳与
乙烯和另一种烯烃不饱和烃共聚物的工艺,该催化剂组合物包括 a)
钯化合物;b) pKa 小于 4 的酸阴离子,但该酸不是氢卤酸;c) 通式中的氮双齿配位体,其中 X 和 Y 代表相似或不同的有机桥基,每个桥基含有三个或四个原子,其中至少两个是碳原子;以及 d) 有机氧化剂。