Synthesis and catalytic activity of heterodinuclear Ru-Ir and Ru-Rh Complexes. Crystal structure of (pz = pyrazolate, TFB = tetrafluorobenzobarrelene)

Article abstract of DOI:10.1016/0022-328X(90)85382-9

Reactions of the ruthenium compounds (R = Ph, n = 3; R = ⁱPr, n = 2) with pyrazole C3H4N2 (Hpz) give the complexes .Treatment of these complexes with a hydrogen abstractor (methoxide ion or acetylacetonate (acac)), such as 2 (M = Ir, Rh; diolefin = cycloocta-1,5-diene (COD), tetrafluorobenzobarrelene (TFB) or 3-C3H5)> has given the heterobinuclear complexes (R = Ph; M = Ir or Rh, L2 = COD or TFB; R = ⁱPr, M = Rh, L2 = TFB; R = Ph, M = Pd, L2 = C3H5).The structure of has been established by an X-ray diffraction study.The species is binuclear, with a pyrazolate group and chlorine atom as bridging ligands.The intermetallic separation is 3.8907(6) Angstroem.The reduction of cyclohexanone by hydrogen transfer from isopropanol catalyzed by (H(CO)(PPh3)2Ru(μ-Cl)(μ-pz)M(diolefin)> (M = Ir, Rh; diolefin = COD, TFB) is also reported.