Compounds of the type [RuCl2(RPX2)(2)] 4-7 (R=iPr, tBu; X=CH2CH2OMe, CH2CO2Me) were prepared by reacting RPX2, with either RuCl3. 3H(2)O or [RuCl2(PPh3)(3)], respectively. In 4-7 the trifunctional phosphanes coordinate as bidentate ligands to the metal center through the phosphorus atom and the oxygen atom of a methoxy or carbonyl group. The lability of the Ru-O bond allows substitution reactions with CO, tert-butylisonitrile and phenylacetylene. The Ru-Cl bonds in 5 (R = tBu; X = CH2CH2OMe) can be cleaved upon treatment with one or two equiv of AgPF6 yielding mono- or dicationic derivatives. In these complexes the ligands are coordinated to the metal center through the phosphorus and both of the oxygen donor atoms. The reaction of the phosphinoesterenolate compound 17 with Ph2C=C=O leads to the insertion of two molecules of the ketene into the C-H bond of one of the five-membered metal-enolate rings to yield the "expanded" chelate complex 18, the structure of which was determined by X-ray crystallography.
Wolfsberger, Werner; Bank, Juergen; Werner, Helmut, Zeitschrift fur Naturforschung, B: Chemical Sciences, 1995, vol. 50, # 9, p. 1319 - 1328
作者:Wolfsberger, Werner、Bank, Juergen、Werner, Helmut
DOI:——
日期:——
Areneruthenium(II) Complexes with Functionalized Phosphines Coordinating as Mono-, Bi- or Tridentate Ligands
-O-O2PF2)]PF6, 15 – 17, of which 17 (arene=mes; R=tBu) has been characterized by X-ray crystallography. Compounds 13 and 14 react with 2 equiv. of KOtBu in tBuOH/toluene to give the unsymmetrical complexes [Ru(mes)κ3-P,C,O-RP(CHCO2Me)(CH=C(O)OMe)}], 18 and 19, containing both a five-membered phosphinoenolate and a three-membered phosphinomethanide ring. The molecular structure of compound 18 has been