CARBONYLATION CATALYST SYSTEM

摘要

Catalyst system comprising a palladium compound, an acid compound having a pKa > 2 measured in water of 18 DEG C and an non-symmetrical bidentate phosphorous ligand according to formula (I) in which the -PR<1>R<2> group is different from the -PR<3>R<4> group and in which X is a divalent organic bridging group, in which the shortest direct link between the two phosphorous atoms in the bridging group X consists of a chain of 2-10 carbon atoms and optionally a sulphur or oxygen atom.