Acetato and acetylacetonato ruthenium(II) complexes containing SbPri3, PPri3 and PCy3 as ligands‡
Abstract
The triply bridged binuclear ruthenium complex [{Ru(η1-O2CMe)(SbPri3)2}2(µ-O2CMe)2(µ-OH2)] 2 was prepared from [Ru(η3-C3H5)2(SbPri3)2] 1 and MeCO2H in the presence of water. Its molecular structure was determined by X-ray crystallography. The bis(acetylacetonato) complex [Ru(acac)2(SbPri3)2] 3, obtained either from 1 or from [Ru(acac)3], is a suitable starting material for the preparation of monosubstituted derivatives [Ru(acac)2(SbPri3)L] (L = PCy3 4, PPri3 5, C2H4 7 or CCHPh 8) as well as of [Ru(acac)2(PPri3)2] 6. Ligand-displacement reactions of 6 with PhCCR (R = H or SiMe3) and HCCCPh2(O2CMe) led to the vinylidene- and allenylidene-ruthenium complexes [Ru(acac)2(PPri3)L] [L = CCHPh 9, CC(SiMe3)Ph 10 or CCCPh2 11], respectively. Treatment of 2 with PCy3 and PPri3 gave the compounds [Ru(O2CMe)2(PR3)2] (R = Cy or PPri3), of which the first smoothly reacted with HCCR to yield [Ru(η2-O2CMe)(η1-O2CMe)(CCHR)(PCy3)2] (R = Ph or CO2Me).