Browsing by Author "Rheingold, Arnold L."

Now showing 1 - 4 of 4
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    Hexakis(benzonitrile)ruthenium(II) bis[tetrafluoroborate(1-)]: a precursor to ruthenium organometallic compounds
    (Springer, 2015-11-14) Owalude, Samson O.; Odebunmi, Ezekiel O.; Eke, Uche B.; Tella, Adedibu C.; Rheingold, Arnold L.; Jackson, Randy; Suib, Steven L.
    The new compound, [Ru(NCC6H5)6][BF4]2, has been synthesized by reaction of the polymeric species [{RuCl2(COD)}x] (COD = 1,5-cyclooctadiene) with benzonitrile under reflux and characterized by elemental analysis, IR, NMR spectroscopic analyses, and single crystal X-ray diffraction. The Ru(II) atom is coordinated by six N atoms from six benzonitrile ligands in distorted octahedralc oordination geometry. The compound was crystallized in the monoclinic space group P21/c with unit-cell dimensions a = 10.7536(11) A ° , b = 18.6582(18) A °, c = 20.311(2) A ° , b = 91.864(2) , V = 4073.2(7) A ° 3 and final R of 0.0429.
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    Syntheses and X-ray crystal structures of two ruthenium(II) complexes derived from acetonitrile and dimethylphenylphosphonite
    (Elsevier B.V., 2013-04-10) Owalude, Samson O.; Odebunmi, Ezekiel O.; Eke, Uche B.; Rheingold, Arnold L.; Opembe, Naftali; Suib, Steven L.
    The ruthenium acetonitrile complex [RuCl2(NCCH3)2{P(OCH3)2C6H5}2] (1) and the stable salt [Ru(CH3CN)4{P(OCH3)2C6H5}2][BF4]2 (2) have been prepared from [RuCl2(NCCH3)2(COD)] and the salt [Ru(COD)(CH3CN)4][BF4]2 respectively. The two compounds have been characterized by IR, microanalytical, NMR measurements and single-crystal X-ray diffraction studies. The ruthenium in both compounds has almost ideal octahedral coordination geometry. One of the complexes, [RuCl2{P(OCH3)2C6H5}2(NCCH3)2] (1) has shown significant catalytic activity for the transfer hydrogenation of simple ketones while the other, [Ru{P(OCH3)2C6H5}2(NCCH3)4][BF4]2 (2) did not show any catalytic activity for this reaction.
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    The Synthesis and Structure of Hexakis(dimethylphenylphosphonite)ruthenium(II) bis[tetraphenylborate(–1)]
    (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2014-02-12) Owalude, Samson O.; Odebunmi, Ezekiel O.; Eke, Uche B.; Tella, Adedibu C.; Rheingold, Arnold L.; Suib, Steven L.
    Treatment of the hydrazine salt [Ru(COD)(H2NNH2)4][BPh4]2 with excess of P(OMe)2Ph in acetone gave a homoleptic complex trans-[Ru{P(OMe)2Ph}6][BPh4]2, which was characterized by IR, 31P{1H}, 13C{1H}, and 1H NMR spectroscopy, elemental analysis, and X-ray crystallography. The ruthenium in the complex has distorted octahedral coordination arrangement and bonded to all the six P(OMe)2Ph molecules through the phosphorus atoms.
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    Synthesis of new ruthenium(II) complexes derived from labile nitrile ligands: an alternative route to the preparation of transdichlorotetrakis(diphenylphosphine)ruthenium(II)
    (Taylor and Francis, UK., 2017-03-19) Owalude, Samson O.; Tella, Adedibu C.; Odebunmi, Ezekiel O.; Eke, Uche B.; Golen, James E.; Rheingold, Arnold L.; Mahlaka, Thabo Joel; Meijboom, Reinout
    New ruthenium(II) complexes containing labile nitrile ligands have been prepared by treatment of either the polymer [{RuCl2(COD)}x] (COD = cycloocta-1,5-diene) (1) or its derivative [RuCl2(COD)(NCCH3)2]·NCCH3 (2) with the appropriate nitrile ligands in refluxing acetonitrile under argon. A new route to synthesis of trans-dichlorotetrakis(diphenylphosphine)ruthenium(II) (7) was also reported. A redetermination of the structure of 7 was undertaken and X-ray crystallographic data revealed that the complex crystallizes in the triclinic space group P-1 with unit cell dimensions a = 12.7016(9) Å, b = 13.0847(10) Å, c = 14.1498(10) Å, α = 101.46(3)°, V = 2080.6(3) Å3, Z = 2 and R = 0.0309. Its polymorph 7′ was also obtained. The crystal structure of 4 was also determined. This complex crystallizes in the monoclinic space group C2/c with unit cell dimensions a = 27.0510(3) Å, b = 11.0984(13) Å, c = 13.0450(16) Å, α = 90°, V = 3886.5(8) Å3, Z = 8 and R = 0.0282.