Synthesis and Structure Determination of an Oxygen-Functionalized Ruthenacycle: Intramolecular Attack of Coordinated Hydroxide on an Acetylenic Ligand
The reaction of a tetranuclegar hydroxoruthenium complex [(η5-C5Me5)Ru(μ3-OH)]4 (1) with dimethyl acetylenedicarboxylate (DMAD) proceeded at 60 °C to generate a dinuclear oxygen-functionalized ruthenacycle [(η5-C5Me5)Ru]2[μ-η5-OC4(CO2Me)4] (2) via an intramolecular attack of hydroxo ligand on the coordinated C-C unsaturation. The molecular structure of 2 was determined by X-ray diffraction.