ChemInform Abstract: The Reactions of Dihydridotetrakis(triphenylphosphine)ruthenium(II), Tetrakis‐hydridotris(triphenylphosphine)ruthenium(II) and Hydrido‐(η3‐2‐diphenylphosphinophenyl)bis(triphenylphosphine)ruthenium(II) with Alkenes, Dienes, Ketones,Aldehydes, and Weak Acids.