Agostic interaction in formally five-coordinate hydridobis[1,3-bis(diphenylphosphino)propane]ruthenium(II) ion

The molecular structures of [RuH(dppp)(2)](+) (1) and [RuH{OC(CH3)(2)}(dPPe )(2)](+) (2) ions in the PF6- salts were determined by the X-ray crystallog raphy. 1 involves the agostic interaction between the ortho C-H bond of a p henyl group of the dppp ligands and the formally unsaturated Ru center, and takes the cis geometry, where the terminal hydride and the agostic C-H moi ety occupy the adjacent sites to each other. 2 adopts a typical octahedral six-coordinate structure with a coordinating acetone molecule trans to the hydride.