Synthesis and X-ray structure of cationic β-diimine palladium complexes containing π-methallyl ligand

High yield of cationic palladium β-diimine complexes [(CH2(MeCNAr)2)Pd(η3-C4H7)][Y] (Ar = C6H5, Y = PF6 (8); 2-Me-C6H4, Y = PF6 (9); 2,6-Me2-C6H3, Y = PF6 (10); 2,6-iPr2-C6H3, Y = PF6 (11), Y = B(3,5-(CF3)2-C6H3)4 (12)) have been obtained by an oxidative addition of the methallyloxyphosphonium salts (5, 6) to a preformed complex Pd(dba)2 (7) in the presence of the β-iminoamine ligands (1–4). These complexes are thermally stable and have been characterized by 1H and 13C{1H} NMR as well as IR spectroscopy. The structure of the cationic allyl palladium complex (12) has been solved by X-ray crystallography.