Isolation and crystallographic characterization of solvate- and anion-stabilized PCP pincer complexes of palladium(II)

Abstract Pincer PCP-Pd(II) complex [PdCl(PCP)] ( 1 ) (PCP =  − CH(CH 2 CH 2 PPh 2 ) 2 ) reacts with AgNO 3 to give [Pd(NO 3 )(PCP)] ( 2 ). Similar reaction with AgBF 4 gives the aqua complex [Pd(OH 2 )(PCP)][BF 4 ] ( 3 ) and the dinuclear complex [{Pd(PCP)} 2 (μ-Cl)][BF 4 ] ( 4 ) with singly bridging chloro ligand. All new complexes were characterized by NMR spectroscopy, ESI-MS and single-crystal X-ray diffraction. Complex 1 and the triflate complex [Pd(OTf)(PCP)] ( 5 ) are active towards Suzuki–Miyaura coupling between aryl bromides and phenyl boronic acid.