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Browsing by Author "Vertlib, Viatcheslav"

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  • cis-Diazido[bis(diphenylphosphino)methane-κ2P,P′]ruthenium(II) dichloromethane 0.42-solvate
    Publication . Russo, Luca; Nättinen, Kalle; Vertlib, Viatcheslav; Rodrigues, João; Rissanen, Kari
    2006Journal article Open access Show more
  • Ruthenium metallodendrimers based on Nitrile-functionalized Poly(alkylidene imine)s
    Publication . Ornelas, Cátia; Vertlib, Viatcheslav; Rodrigues, João; Rissanen, Kari
    The preparation of the first- and second-generation of nitrilefunctionalized poly(alkylidene imine) dendrimers with the organometallic ruthenium complex [Ru(η5-C5H5)(PPh3)2Cl] peripherally attached is described. The reaction of N,N -bis(cyanomethyl)piperazine (1), N,N -bis[N ,N -bis(cyanoethyl)aminoethyl]piperazine (2), or N,N,N ,N -tetrakis(cyanoethyl)ethylenediamine (3) with [Ru(η5-C5H5)(PPh3)2Cl] (4) in the presence of TlPF6 gives the new air-stable ruthenium metallodendrimers 5, 6, and 7, respectively. These stable metallodendrimers are easily prepared and represent a novel quantitative method to solidify and chromatographically purify the otherwise semi-liquid nitrile-functionalized poly(alkylidene imine) dendrimers. The compounds were fully characterized by IR and 1H, 13C, and 31P NMR spectroscopy, and mass spectrometry. These dendrimers represent the first example of the utilization of nitrile-functionalized poly(alkylidene imine)s as cores in the preparation of metallodendrimers.
    2006Journal article Restricted access Show more
  • A trinuclear aqua cyano-bridged ruthenium complex [{(η5-C5H5)(PPh3)2Ru(μ-CN)}2RuCl2(PPh3)(H2O)]PF6: synthesis, characterization and crystal structure
    Publication . Vertlib, Viatcheslav; Figueira, João; Mesquita, José; Rodrigues, João; Nättinen, Kalle; Rissanen, Kari
    The organometallic trinuclear aqua cyano-bridged complex [{(η5-C5H5)(PPh3)2Ru(µ-CN)}2RuCl2(PPh3)(H2O)]PF6 (1), in which the fragment [RuCl2(PPh3)(H2O)] acts as a bridge and an acceptor group between the two terminal cyclopentadienyl ruthenium cyano moieties, was isolated in moderate yield from the reaction of [(η5-C5H5)(PPh3)2RuCN] with [RuCl2(PPh3)3] in THF. To the best of our knowledge, compound 1 is one of the few examples of a trinuclear array of ruthenium fragments bridged by the nitrogen atom of the –C N– group (Ru–C N–Ru –N C–Ru) with a Ru-coordinated water molecule. The new aqua complex was structurally characterized by FTIR, 1H, 13C, and 31P NMR spectroscopy, mass spectrometry, elemental analysis, single-crystal X-ray diffraction, and cyclic voltammetry. The title complex crystallizes in a triclinic unit cell a = 17.3477(6) Å, b = 17.8551(5) Å, c = 18.2460(7) Å, α = 95.693(2)°, β = 111.648(2)°, and γ = 97.839(2)° in the space group P1 ¯ with Z = 2.
    2007Journal article Restricted access Show more