LIGAND METALATION IN TRIISOPROPYLPHOSPHINE-PLATINUM(II) COMPOUNDS

The compound ulfonato)(bis(triisopropylphosphine))-platinum(II) (1) is stable in solution at room temperature, but when treated with a catal ytic amount of HCl, it undergoes rapid loss of methane and forms the m etalated compound isopropyl-3-methyl-1-platina-2-phosphacyclobutane) ( 2). The key intermediate is sulfonato)(bis-triisopropylphosphine))plat inum(II) (3), which rapidly undergoes metalation with loss of trifluor omethanesulfonic acid.