Synthesis and reactivity of phosphine-arenesulfonate Palladium(II) alkyl complexes that contain methoxy substituents

Publication date: Available online 14 June 2019Source: Journal of Organometallic ChemistryAuthor(s): Qian Liu, Richard F. JordanAbstractPhosphine-arenesulfonate ligands that contain 1-3 methoxy substituents on the benzo linker, P(2-OMe-Ph)2(2-SO3Na-5-OMe-Ph) (Na[1a]), P(2-MeO-Ph)2(2-SO3Na-4,5-(OMe)2-Ph) (Na[1b]) and P(2-MeO-Ph)2(2-SO3Li-3,4,5-(OMe)3-Ph) (Li[1c]) were synthesized and isolated in 52–85% yield. Reaction of Na[1a,b] and Li[1c] with (COD)PdMeCl and pyridine generates the corresponding (PO)PdMe(pyridine) complexes 2a-c. 2a and 2b were isolated in crystalline form in 59% and 86% yield, respectively, while 2c decomposed during attempted isolation. 2a,b polymerize ethylene to linear polyethylene and copolymerize ethylene with vinyl fluoride (VF) to linear copolymer with ca. 0.5 mol % VF incorporation.Graphical abstractThe phosphine-arenesulfonate ligands Na[1a,b] and Li[1c] react with (COD)PdMeCl and pyridine to generate (PO)PdMe(pyridine) complexes 2a-c, which contain 1-3 methoxy groups on the benzo linker. 2a,b have been characterized by X-ray crystallography while 2c is thermally unstable. The ethylene polymerization and ethylene/vinyl-fluoride copolymerization behavior of 2a,b have been investigated.

Source: Journal of Organometallic Chemistry - June 15, 2019 Category: Chemistry Source Type: research