194982-98-4Relevant academic research and scientific papers
The carboxylate-bridged polymer [{Ru2[μ-η2-OC(R)O]2(CO) 4}n] (R = H, Me or Et) as a synthon in the synthesis of dinuclear phosphorus pyridyl-, quinolyl- and bipyridyl-bridged derivatives of ruthenium(I)
Field, John S.,Haines, Raymond J.,Parry, Campbell J.
, p. 2843 - 2848 (1997)
Treatment of [{Ru2[μ-η2-OC(R)O]2(CO) 4}n] or its acetonitrile adduct [Ru2{μ-η2-OC(R)O}2(CO) 4(MeCN)2] (R = H, Me or Et) with a two-fold molar equivalent of the phosphorus-nitrogen ligands 2-diphenylphosphinopyridine (dppy), 2-diphenylphosphinoquinoline (dpquin) and 6-diphenylphosphino-2,2′-bipyridine (dpbipy) in alcohol under reflux resulted in the formation of dinuclear products of the type [Ru2{μ-η2-OC(R)O}2(CO) 4-(PPh2R′)2] (R′ = pyridyl, quinolyl or bipyridyl) in which the PPh2R′ ligands are monodentate, co-ordinating axially through the phosphorus donor atoms, as established X-ray crystallographically for [Ru2{μ-η2-OC(Me)O}2-(CO) 4(dppy)2]. On the other hand reaction of [{Ru2(μ-η2-OC(R)O]2(CO) 4}n] with 2 molar equivalents of dppy or dpquin in toluene under reflux in the presence of NH4PF6 and under a slight pressure of carbon monoxide afforded products of the type [Ru2{μ-η2-OC(R)O}(CO)4(μ-dppy) 2]PF6 or [Ru2{μ-η2-OC(R)O}(CO)4(μ-dpquin) 2]-PF6 in which the dppy or dpquin ligands adopt the bridging co-ordination mode, this mode of co-ordination being confirmed through a crystal structure determination on [Ru2{μ-η2-OC(H)O}(CO)4(μ-dppy) 2]PF6. Reaction of [{Ru2(μ-η2-OC(R)O]2(CO) 4}n] with dpbipy in n-butanol under reflux likewise afforded products, isolated as their hexafluorophosphate salts, in which the phosphorus-nitrogen ligands are bridging, viz. [Ru2{μ-η2-OC(R)O}-(CO) 2(μ-dpbipy)2]PF6, the structure of [Ru2{μ-η2-OC(Me)O}(CO) 2(μ-dpbipy)2]PF6 being established X-ray crystallographically.
