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Therrien, Bruno

Nom
Therrien, Bruno
Affiliation principale
Fonction
Professeur titulaire
Email
bruno.therrien@unine.ch
Identifiants
https://libra.unine.ch/handle/123456789/382
_
0000-0002-0388-2745

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  • Publication
    Métadonnées seulement
    Synthesis of benzene ruthenium triazolato complexes by [3+2] cycloaddition reactions of activated alkynes and fumaronitrile to benzene ruthenium azido complexes
    (2008)
    Pachhunga, Khenglawt
    ;
    Therrien, Bruno 
    ;
    Kollipara, Mohan Rao
    Dinuclear [(?6-C6H6)Ru(?-N3)Cl]2 (1) was obtained by the reaction of [(?6-C6H6)RuCl2]2 with Na azide in EtOH. The benzene Ru ?-diketonato complexes [(?6-C6H6)Ru(L?L)Cl] {L?L = O,O'-acac (2); O,O'-bzac, Hbzac = benzoylacetone (3); O,O'-dbzm, Hdbzm = dibenzoylmethane (4)} were obtained in MeOH by the reaction of [(?6-C6H6)RuCl2]2 with the corresponding ?-diketonates. These complexes further react with Na azide in EtOH to yield [(?6-C6H6)Ru(L?L)N3] [L?L = O,O'-acac (5); L?L = O,O'-bzac (6); L?L = O,O'-dbzm (7)]. The complexes 5-7 were obtained as well by treating 1 with Na salts of ?-diketonates. These neutral benzene Ru azido complexes undergo [3+2] dipolar cycloaddn. reaction with activated alkynes (MeO2CC?CCO2Me, EtO2CC?CCO2Et) or fumaronitrile (NCHC=CHCN) to yield the corresponding benzene Ru triazolato complexes; [(?6-C6H6)Ru(O,O'-acac){N3C2(CO2Me)2}] (8), [(?6-C6H6)Ru(O,O'-acac){N3C2(CO2Et)2}] (9), [(?6-C6H6)Ru(O,O'-acac){N3C2HCN}] (10), [(?6-C6H6)Ru(O,O'-bzac){N3C2HCN}] (11) and [(?6-C6H6)Ru(O,O'-dbzm){N3C2HCN}] (12). These complexes are fully characterized from microanalyses, FTIR and FT-NMR spectroscopy. The mol. structure of [(?6-C6H6)Ru(O,O'- acac){N3C2(CO2C2H5)2}] (9) is confirmed by single crystal x-ray diffraction study. [on SciFinder(R)]
  • Publication
    Accès libre
    Reactivity studies of cyclopentadienyl ruthenium(II), osmium(II) and pentamethylcyclopentadienyl iridium(III) complexes towards 2-(2′-pyridyl)imidazole derivatives
    (2007)
    Pachhunga, Khenglawt
    ;
    Therrien, Bruno 
    ;
    Kreisel, Kevin A.
    ;
    Yap, Glenn P.A.
    ;
    Kollipar, Mohan Rao
    The reaction of [CpRu(PPh3)2Cl] and [CpOs(PPh3)2Br] with chelating 2-(2′-pyridyl)imidazole (N ∩ N) ligands and NH4PF6 yields cationic complexes of the type [CpM(N ∩ N)(PPh3)] + (1: M = Ru, N ∩ N = 2-(2′-pyridyl)imidazole; 2: M = Ru, N ∩ N = 2-(2′-pyridyl)benzimidazole; 3: M = Ru, N ∩ N = 2-(2′-pyridyl)-4,5-dimethylimidazole; 4: M = Ru, N ∩ N = 2-(2′-pyridyl)-4,5-diphenylimidazole; 5: M = Os, N ∩ N = 2-(2′-pyridyl)imidazole; 6: M = Os, N ∩ N = 2-(2′-pyridyl)benzimidazole). They have been isolated and characterized as their hexafluorophosphate salts. Similarly, in the presence of NH4PF6, [Cp*Ir(μ-Cl)Cl]2 reacts in dry methanol with N ∩ N chelating ligands to afford in excellent yield [Cp*Ir(N ∩ N)Cl]PF6 (7: N ∩ N = 2-(2′-pyridyl)imidazole; 8: N ∩ N = 2-(2′-pyridyl)benzimidazole). All the compounds have been characterized by infrared and NMR spectroscopy and the molecular structure of [1]PF6, [2]PF6 and [7]PF6 by single-crystal X-ray structure analysis.