446255-95-4Relevant academic research and scientific papers
Synthesis and reactivity of a palladium (I)-palladium (I)-bonded μ-hydroxo complex supported by a bridging butadiene ligand
Abdul Jalil,Nagai, Tomoki,Murahashi, Tetsuro,Kurosawa, Hideo
, p. 3317 - 3322 (2002)
The first Pd-Pd bonded hydroxo-bridged organopalladium dinuclear complex, [Pd2(μ-OH)(THF)(μ-η2:η2-1,3-C 4H6] [PPh3)2] [PF6] (1-THF), was synthesized by a reaction of the sandwich-type complex [Pd2(μ-η2:η2-1,3-C4H 6)2(PPh3)2] [PF6]2 with sodium hydroxide in tetrahydrofuran. Reactions of 1-THF with p-toluidine, 3,5-dimethylpyrazole (Hdmpz), benzenethiol, isopropyl alcohol, and p-cresol afforded a series of heteroatom-bridged dinuclear complexes with the general formula [Pd2(μ-E)(μ-η2:η2-1,3-C4 H6)(PPh3)2][PF3] (E = NHC6H4Me-p (2), dmpz (3), SPh (4), OCH(CH3)2 (5), OC6H4Me-p (6)). However, the μ-alkoxo complex 5 was unstable and rapidly decomposed via β-hydrogen elimination by releasing acetone. The complexes 1-THF and 2 were structurally characterized by single-crystal X-ray diffraction analyses. X-ray crystallography of 1-THF revealed that the complex molecule contained a tetrahydrofuran molecule that was associated with the bridging hydroxide through O?H-O hydrogen bonding. The complex 6 was reversibly converted to a hydroxo-bridged complex in the presence of excess water.
