Abstract: | The cationic diphenylphosphido-bridged compound Ru2(μ-PPh2)(μ-OH)2(η6-p-cymene)2]PF6) (2) has been prepared by reaction of the tri-μ-hydroxo complex Ru2(μ-OH)3(η-p-cymene)2]PF6] (1) with diphenylphosphine. Complex 2 eliminates water on reaction with protic acids, incorporating the conjugate base of the added acid as a bridging ligand. Formic acid, acetic acid, phenol, and aniline react with 2 to give the monosubstituted compounds Ru2(μ-PPh2)(μ-OH)(μ-L)(η6-p-cymene)2]PF6] (L = HCO2, MeCO2, OPh, or NHPH), whereas methanol, thiophenol, 1,2-benzenedithiol, hydrochloric acid and isopropanol afford the disubstituted derivatives Ru2(μ-PPh2)(μ-L)2(η6-p-cymene)2]PF6] (L = OMe, SPh,
S2C6H4, Cl, or H). |