Cyclopentadienyl-ruthenium and -osmium chemistry. XXII. Synthesis, X-ray structure and some reactions of RuCl(PPh3,)(η1-dppm)(η-C5H5),containing a monodentate CH2(PPh2)2 ligand

.Stoichiometric amounts of RuCl(PPh3)2(?-C5H5) and dppm react in refluxing C6H6 to give RuCl- (PPh3)(?1-dppm)(?-C5H5) which has been fully characterized by an X-ray study (triclinic, space group P1, a 22.377(6), b 9.913(2), c 9.826(3)?, a 70.46(2), ß 78.72(2), ? 80.40(2)°, Z 2) in which 3299 data [I > 3s(I)] were refined to R 0.046, R' 0.052. Structural parameters are similar to those of other RuX(PR3)2(?-C5H5) complexes. The chloro complex was converted into [Ru(PPh3)(?2- dppm)(?-C5H5)]+ salts; the other PPh3 ligand can be replaced by a second dppm ligand to give [Ru(dppm)2(q-C5H3)+ which contains both mono- and bidentate dppm ligands. Alkylation of the uncoordinated phosphorus with MeI is accompanied by halogen exchange to give [RuI(PPh3)- (PPh2CH2PMePh2)(?-C5H5)I], while reactions with a variety of transition metal complexes result in abstraction of PPh3 and formation of RuCl(dppm)(?-C5H5).