The preparation and reactions of (η3-allyl)2Ru[Pr2iP(CH2)nPPr2i] complexes
摘要:
The title compounds have been prepared either by reacting (cod)(eta(3)-2-MeC3H4)(2)Ru with the appropriate bisphosphine or Ru((Pr2P)-P-i(CH2)(n)PPr2i)Cl-2 with allylmagnesium chloride. In contrast to the analogous iron compounds, the eta(3)-allyl-Ru compounds react with 1,5-hexadiene to give (eta(5)-1-hexadienyl)RuH complexes irrespective of the length of the methylene chain joining the two P atoms in the bidentate ligand. The eta(3)-C3H5-containing compounds react more selectively than the eta(3)-2-MeC3H4-containing compounds and the product of the reaction of the former with acetic acid has been shown by X-ray crystallography to be the ionic complex [Ru((Pr2PC2H4PPr2i)-P-i)(2)OAc]+OAc-. (C) 1997 Elsevier Science S.A.