Structure of Bis(dimethylphenylphosphine)(ethylene)(carbonyl)dichlororuthenium(II), RuCl2(CO)(C2H4)(P(CH3)2(C6H5))2, a six-coordinate d6Complex Containing Ethylene as a Ligand

James A. Ibers, Leo D. Brown, C. F.J. Barnard, R. J. Mawby

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Bis(dimethylphenylphosphine)(ethylene)(carbonyl)dichlororuthenium(II), RuCl2(CO)(C2H4)(P(CH3)2(C6H5))2, is a six-coordinate complex containing ethylene as one of its ligands. In the solid state, the molecule has crystallographically imposed C2-2 symmetry, the twofold axis being along the Cl(l)-Ru bond and bisecting the trans C2H4 group. The equatorial ligands of this octahedral complex are the PMe2Ph groups, the Cl(2) atom, and the CO group. Owing to the imposed symmetrv, the CO group is disordered with respect to the Cl(2) atom. Important distances are Ru-P = 2.414 (1), Ru-Cl(l) = 2.415 (2), Ru-Cl(2) = 2.454 (3), Ru-C(of C2H4) = 2.214 (4), Ru-C(of CO) = 1.831 (10), and C=C = 1.376 (10) A. The disposition of the ethylene group is such that the C=C bond is essentially parallel to the Ru-P bonds. Spectroscopic data obtained from the compound in solution are consistent with this solid-state structure. However, in solution the ethylene group is rotating about the ruthenium-ethylene bond as evidenced by the single proton resonance observed for all four C2H4 protons even down to -40 °C. The compound crystallizes with four molecules in space group C2h6-C2/c of the monoclinic system in a cell of dimensions a = 9.033 (4) Å, b = 11.494 (5) Å, c = 20.936 (9) Å, and β = 99.10 (2)°. The structure has been refined by least-squares methods to values of the R and weighted R indices of 0.044 and 0.055, respectively, for the 94 variables and 2998 significant observations.

Original languageEnglish (US)
Pages (from-to)2932-2935
Number of pages4
JournalInorganic chemistry
Issue number10
StatePublished - 1978

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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