Reaction of diruthenium(II,III) acetate with triphenylphosphine
摘要:
The reaction of [Ru2(mu-O2CCH3)4(thf)2]BF4 with triphenylphosphine in thf or toluene is described. In this reaction, a yellow compound of formula Ru(O2CCH3)2 (PPh3).CH3C6H5 (1), and a violet, diamagnetic oxo-bridged compound, formulated as Ru2(mu-O)(mu-O2CCH3)2(O2CCH3)2(PPh3)2 (2) are obtained. The compounds have been characterized by elemental analysis, magnetic susceptibility measurements and spectroscopic techniques. The structure of 2 has been determined by X-ray crystallography. Two pseudo-octahedral ruthenium(III) atoms are bridged by an oxo and two acetate ligands. The hexacoordination of each ruthenium atom is completed with a bidentate acetate and a triphenylphosphine ligand. Some spectroscopic evidence for the formation of a tetranuclear intermediate compound is also presented.