Transformation of the bis(diphenylphosphino)methane ligand on the triruthenium nonacarbonyl framework. Synthesis and characterization of the ruthenium complexes Ru3(CO)9(.mu.3-.eta.3-P(C6H5)CH2P(C6H5)(C6H4)), Ru3(CO)9(.mu.-H)(.mu.3-.eta.2-P(C6H5)CH2P(C6H5)2), and Ru3(CO)10(.mu.-.eta.2-P(C6H5)CH2P(C6H5)(C6H4))