Phosphorus-containing compounds, processes for their preparation and intermediates therefor, their use in the catalysis of copolymerization processes, and copolymers thereby produced

摘要

This invention relates to processes for making phosphorus compounds R 2 P-X-PR 2 , R 2 P-M, R 2 P-L and R 3 P, and the novel cation R 2 P + (L)-X-P + (L)R 2 , where R represents an optionally substituted hydrocarbyl group, X represents a bridging group, L represents a leaving group and M represents an alkali metal atom. The invention relates further to a process for making a compound R 2 P-L from a compound R-H via a new process for making the compound R-Li followed by its reaction with a compound Hal 2 P-L. The compound R 2 P-X-PR 2 is a ligand suitable for making catalysts for copolymerizing carbon monoxide and an olefinically unsaturated compound.