New water-soluble palladium(II) iodide complexes derived from N-protonated or N-alkyl-1,3,5-triaza-7-phosphaadamantanes: Synthesis, crystal structure and catalytic properties in aqua media

The new aqua-soluble, zwitterionic palladium(II) complexes [PdI3(PTA-R)] (R = H, Me, Et, nPr, nBu) have been prepared and fully characterized including by X-ray crystallography (for R = Me). The complexes catalyse efficiently Heck reaction of iodobenzene and n-butyl acrylate as well as iodobenzene and substituted styrenes, under mild conditions in water as a solvent.