Catalyst compositions.

摘要

Novel catalyst compositions based upon: a) a Group VIII metal, b) an anion of an acid with a pKa of less than 6, c) a phosphorus bidentate ligand with the general formula (R<1>)(R<2>)P-R-P(R<1>)(R<2>) in which R<1> and R<2> represent identical or different optionally polar substituted hydrocarbyl groups and in which R is a divalent organic bridging group which in the bridge connecting the two phosphorus atoms with each other contains at least two carbon atoms, and d) an amine. They are especially suitable to prepare polymers of carbon monoxide and C3+ alpha -olefins having a low proportion of furandiyl groups.