Synthesis and properties of the tetranuclear palladium chalcogenolato-acetato complex [Pd(SePh)(OOCCH3)]4 with Pd-Pd bonding: an experimental and theoretical study.

The first tetranuclear palladium selenophenolate complex has been synthesized by reaction of palladium acetate with (PhSe)(3)Sn-(CH(2))(4)-Sn(SePh)(3) () in dichloromethane. represents a rectangular arrangement of the four Pd atoms bridged by four mu-bridging SePh and OAc groups each and is thermolyzed into a novel phase Pd(10)Se(7). The alternating distribution of acetate or selenophenolate bridges over the PdPd edges, that allows for the formation of two Pd-Pd bonds, was rationalized by quantum chemical investigations.