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

Abstract

.Stoichiometric amounts of RuCl(PPh₃)₂(η-C₅H₅) and dppm react in refluxing C₆H₆ to give RuCl- (PPh₃)(η¹-dppm)(η-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)Ǻ, α 70.46(2), β 78.72(2), γ 80.40(2)°, Z 2) in which 3299 data [I > 3σ(I)] were refined to R 0.046, R' 0.052. Structural parameters are similar to those of other RuX(PR₃)₂(η-C₅H₅) complexes. The chloro complex was converted into [Ru(PPh₃)(η²- dppm)(η-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)(η-C₅H₅)I], while reactions with a variety of transition metal complexes result in abstraction of PPh₃ and formation of RuCl(dppm)(η-C₅H₅).