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Süss-Fink, Georg

Nom
Süss-Fink, Georg
Affiliation principale
Fonction
Professeur ordinaire
Email
georg.suess-fink@unine.ch
Identifiants
https://libra.unine.ch/handle/123456789/385

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  • Publication
    Accès libre
    Bimetallic ruthenium–tin chemistry: Synthesis and molecular structure of arene ruthenium complexes containing trichlorostannyl ligands
    (2010)
    Therrien, Bruno 
    ;
    Thai, Trieu-Tien
    ;
    Freudenreich, Julien 
    ;
    Süss-Fink, Georg 
    ;
    Shapovalov, Sergey S.
    ;
    Pasynskii, Alexandr A.
    ;
    Plasseraud, Laurent
    A series of neutral, anionic and cationic arene ruthenium complexes containing the trichlorostannyl ligand have been synthesised from SnCl2 and the corresponding arene ruthenium dichloride dimers [(η6-arene)Ru(μ2-Cl)Cl]2 (arene = C6H6, PriC6H4Me). While the reaction with triphenylphosphine and stannous chloride only gives the neutral mono(trichlorostannyl) complexes [(η6-C6H6)Ru(PPh3)(SnCl3)Cl] (1) and [(η6-PriC6H4Me)Ru(PPh3)(SnCl3)Cl] (2), the neutral di(trichlorostannyl) complex [(η6-PriC6H4Me)Ru(NCPh)(SnCl3)2] (3) could be obtained for the para-cymene derivative with benzonitrile as additional ligand. By contrast, the analogous reaction with the benzene derivative leads to a salt composed of the cationic mono(trichlorostannyl) complex [(η6-C6H6)Ru(NCPh)2(SnCl3)]+ (5) and of the anionic tris(trichlorostannyl) complex [(η6-C6H6)Ru(SnCl3)3]− (6). On the other hand, [(η6-PriC6H4Me)Ru(μ2-Cl)Cl]2 reacts with SnCl2 and hexamethylenetetramine hydrochloride or 18-crown-6 to give the anionic di(trichlorostannyl) complex [(η6-PriC6H4Me)Ru(SnCl3)2Cl]− (4), isolated as the hexamethylenetetrammonium salt or the chloro-tin 18-crown-6 salt. The single-crystal X-ray structure analyses of 1, 2, [(CH2)6N4H][4], [(18-crown-6)SnCl][4] and [5][6] reveal for all complexes a pseudo-tetrahedral piano-stool geometry with ruthenium–tin bonds ranging from 2.56 (anionic complexes) to 2.60 Å (cationic complex).
  • Publication
    Accès libre
    Hexacatenar liquid-crystalline complexes of palladium(II) and platinum(II) based on trialkoxystilbazole esters
    (2002)
    Plasseraud, Laurent
    ;
    Gonzalez Cuervo, Laura
    ;
    Guillon, Daniel
    ;
    Süss-Fink, Georg 
    ;
    Deschenaux, Robert 
    ;
    Bruce, Duncan W.
    ;
    Donnio, Bertrand
    The synthesis and characterisation of 4-(3,4,5-trialkoxybenzoyloxy)pyridines (1a–e), and of their corresponding palladium(II), (2a–e), and platinum(II), (3a–e), complexes are described. The pyridine-based ligands are not mesomorphic, but upon complexation to PdCl2 or PtCl2, new hexacatenar mesogens are formed which show exclusively the hexagonal columnar mesophase. The mesomorphic behaviour of the complexes was characterised by polarised optical microscopy, differential scanning calorimetry and X-ray diffraction. The metal seems to influence the crystal phase and mesophase stability as well as the mesomorphic temperature range.
  • Publication
    Accès libre
    Fixation and spontaneous dehydrogenation of methanol on a triruthenium–iridium framework: synthesis and structure of the cluster anion [HRu3Ir(CO)12(OMe)]–
    (1999)
    Süss-Fink, Georg 
    ;
    Plasseraud, Laurent
    ;
    Ferrand, Vincent
    ;
    Stoeckli-Evans, Helen 
    The anionic mixed-metal cluster [Ru3Ir(CO)13]–1, found to be catalytically active in the carbonylation of methanol, reacts with methanol at 70 °C to give, with O–H activation of the substrate, the cluster anion [HRu3Ir(CO)12(OMe)]–2, which upon prolonged reaction loses formaldehyde to give the cluster anion [H2Ru3Ir(CO)12]–3; both anions 2 and 3 crystallise together as the double-salt [N(PPh3)2]2[HRu3Ir(CO)12(OMe)][H2Ru3Ir(CO)12] the single-crystal X-ray structure analysis of which reveals a butterfly Ru3Ir skeleton for 2 and a tetrahedral Ru3Ir skeleton for 3.
  • Publication
    Accès libre
    [(p-PriC6H4Me)4 Ru4Mo4O16]: an amphiphilic organoruthenium oxomolybdenum cluster presenting a unique framework geometry
    (1997)
    Süss-Fink, Georg 
    ;
    Plasseraud, Laurent
    ;
    Ferrand, Vincent
    ;
    Stoeckli-Evans, Helen 
    The amphiphilic title compound, easily accessible from (p- cymene)ruthenium dichloride dimer and sodium molybdate in aqueous solution, presents an unprecedented Ru4Mo4O12 framework comprising a central Mo4O4 cube with four folded ORuO flaps resembling the sails of a windmill.