Voici les éléments 1 - 10 sur 11
  • Publication
    Métadonnées seulement
    Heteronuclear complexes containing the N,N'-di(2-pyridyl)amidocarboxylferrocene ligand
    (2012)
    Auzias, Mathieu
    ;
    ;
    The ferrocene-derived ligand (NC5H4)2NOC-C5H4FeC5H5 reacts with arene ruthenium complexes [(?6-arene)RuCl2]2 to give the cationic complexes [(?6-p-iPrC6H4Me)RuCl{(NC5H4)2NOC-C5H4FeC5H5}]+ (1) and [(?6-C6Me6)RuCl{(NC5H4)2NOC-C5H4FeC5H5}]+ (2), isolated as the hexafluorophosphate and tetrafluoroborate salts, resp., while the reaction with K2PtCl4 yields the neutral complex PtCl2{(NC5H4)2NOC-C5H4FeC5H5} (3). The mol. structures of 2 and 3 were confirmed by single-crystal x-ray diffraction. [on SciFinder(R)]
  • Publication
    Métadonnées seulement
    Dichlorido[1-(2-chloroethyl)-3-(pyridin-4-ylmethyl-?N)urea](?6-hexamethylbenzene)ruthenium(II) chloroform monosolvate
    (2011)
    Auzias, Mathieu
    ;
    ;
    The RuII atom in the title compd., [RuCl2(C12H18)(C9H12ClN3O)]·CHCl3, exhibits a typical piano-stool coordination, defined by a hexamethylbenzene ligand, two chloride ligands and a pyridylurea ligand coordinated through the pyridine N atom. In the crystal, a dimeric structure is obsd. due to two strong N-H···Cl interactions between the NH groups of urea and the two chloride ligands of neighboring mols. The C=O group of the urea moiety interacts with the solvent mol. through weak C-H···O interactions. Crystallog. data and at. coordinates are given. [on SciFinder(R)]
  • Publication
    Métadonnées seulement
    Dichlorido[1-(2-chloro-eth-yl)-3-(pyridin-4-ylmethyl-?N)urea](?-hexa-methyl-benzene)-ruthenium(II) chloro-form monosolvate
    (2011)
    Auzias, Mathieu
    ;
    ;
    The Ru(II) atom in the title compound, [RuCl(2)(C(12)H(18))(C(9)H(12)ClN(3)O)]?CHCl(3), exhibits a typical piano-stool coordination, defined by a hexa-methyl-benzene ligand, two chloride ligands and a pyridyl-urea ligand coordinated through the pyridine N atom. In the crystal, a dimeric structure is observed due to two strong N-H(midline ellipsis)Cl inter-actions between the NH groups of urea and the two chloride ligands of neighbouring mol-ecules. In addition, the C=O group of the urea moiety inter-acts with the solvent mol-ecule through weak C-H(midline ellipsis)O interactions.[on SciFinder (R)]
  • Publication
    Métadonnées seulement
    New dinuclear Ru2(CO)4 sawhorse-type complexes containing bridging carboxylato ligands
    (2009)
    Auzias, Mathieu
    ;
    Mattsson, Johan
    ;
    ;
    The thermal reaction of Ru3(CO)12 with ethacrynic acid, 4-[bis(2-chlorethyl)amino]benzenebutanoic acid (chlorambucil), or 4-phenylbutyric acid in refluxing solvents, followed by addn. of 2-electron donor ligands (L), gives the diruthenium complexes Ru2(CO)4(O2CR)2L2 (1: R = CH2O-C6H2Cl2-COC(CH2)C2H5, L = py; 2: R = CH2O-C6H2Cl2-COC(CH2)C2H5, L = PPh3; 3: R = C3H6-C6H4-N(C2H4-Cl)2, L = py; 4: R = C3H6-C6H4-N(C2H4-Cl)2, L = PPh3; 5: R = C3H6-C6H5, L = py; 6: R = C3H6-C6H5, L = PPh3). The single-crystal structure analyses of 2, 3, 5, and 6 reveal a dinuclear Ru2(CO)4 sawhorse structure, the diruthenium backbone being bridged by the carboxylato ligands, while the 2 L ligands occupy the axial positions of the diruthenium unit. [on SciFinder(R)]
  • Publication
    Métadonnées seulement
    Arene-ruthenium complexes with ferrocene-derived ligands: Synthesis and characterization of complexes of the type [Ru(?6-arene)(NC5H4CH2NHOC-C5H4FeC5H5)Cl2] and [Ru(?6-arene)(NC3H3N(CH2)2O2C-C5H4FeC5H5)Cl2]
    (2009)
    Auzias, Mathieu
    ;
    Gueniat, Joel
    ;
    ; ;
    Renfrew, Anna K.
    ;
    Dyson, Paul J.
    Pyridylferrocene and imidazolylferrocene arene-Ru complexes [Ru(?6-arene)(L)Cl2] where L = NC5H4CH2NHOCC5H4FeC5H5, arene = p-iPrC6H4Me (1) or C6Me6 (2); L = NC3H3N(CH2)2O2CC5H4FeC5H5, arene = p-iPrC6H4Me (3) or C6Me6 (4), and diruthenium-arene complexes [Ru(?6-arene)Cl2]2(L) where L = 1,1'-(NC5H4CH2NHOC)2C5H4FeC5H4, arene = p-iPrC6H4Me (5) or C6Me6 (6); L = 1,1'-(NC3H3N(CH2)2O2C)2C5H4FeC5H4, arene = p-iPrC6H4Me (7) or C6Me6 (8) were synthesized and characterized. The mol. structures of 1 and 3 were confirmed by single-crystal x-ray diffraction. The in vitro anticancer activities of complexes 1-8 were studied comparatively to the uncoordinated ligands. The complexes exhibit fairly low cytotoxicities in comparison to related ferrocene-derived arene-Ru complexes. [on SciFinder(R)]
  • Publication
    Métadonnées seulement
    Mesomorphic Metallo-Dendrimers Based on the Metal-Metal Bonded Ru2(CO)4 Sawhorse Unit
    (2008)
    Frein, Stephane
    ;
    Auzias, Mathieu
    ;
    Sondenecker, Aline
    ;
    Vieille-Petit, Ludovic
    ;
    Guintchin, Boris
    ;
    Maringa, Natacha
    ;
    ;
    Barbera, Joaquin
    ;
    Dinuclear Ru complexes contg. the stable metal-metal bonded Ru2(CO)4 sawhorse unit with two dendritic carboxylato bridges were synthesized and characterized. All complexes Ru2(CO)4(O2CR)2L2 (R = R1, R2, R3) contg. cyanobiphenyl-based poly(arylester) dendrons of 1st (R1), 2nd (R2), and 3rd (R3) generation and PPh3, pyridine, or 4-picoline ligands L proved to be mesomorphic, giving rise to smectic A or smectic A and nematic phases. The supramol. organization within the smectic A phase is governed by the nature and structure of the mesogenic units and dendritic core. Such materials are of interest for the design of catalytically active anisotropic fluids. [on SciFinder(R)]
  • Publication
    Métadonnées seulement
    Ferrocenoyl Pyridine Arene Ruthenium Complexes with Anticancer Properties: Synthesis, Structure, Electrochemistry, and Cytotoxicity
    (2008)
    Auzias, Mathieu
    ;
    ; ;
    Stepnicka, Petr
    ;
    Ang, Wee Han
    ;
    Dyson, Paul J.
    Reaction of the dimers [Ru(?6-arene)Cl2]2 (arene = C6H6, C6H5Me, p-iPrC6H4Me, C6Me6) with 2 equiv of the ferrocenoyl pyridine (NC5H4(OOCC5H4FeC5H5)-4) affords Ru(II) complexes [Ru(?6-arene)Cl2(NC5H4OOCC5H4FeC5H5)] (arene = C6H6 (1, 85% yield), C6H5Me (2, 81%), p-iPrC6H4Me (3, 91%), C6Me6 (4, 38%)) or with 1 equiv of the dipyridylferrocene deriv. ligand, 1,1'-ferrocene dicarboxylic acid pyridin-4-yl ester (NC5H4OOCC5H4FeC5H4COOC5H4N,) gives [Ru(?6-arene)Cl2]2(NC5H4OOCC5H4FeC5H4COOC5H4N) (arene = p-iPrC6H4Me (5, 74%), C6Me6 (6, 92%)). The mol. structures of these complexes was confirmed by single-crystal x-ray structure anal. of complex 4 as a representative example. The redox properties and in vitro anticancer activities of complexes 1-6 were studied. All the compds. are moderately cytotoxic toward the A2780 and A2780cisR (cisplatin-resistant) human ovarian carcinoma cell lines. The diruthenium arene complexes 5 and 6 are about twice as active as their mononuclear analogs 3 and 4. Cyclic voltammetry revealed a good correlation of the RuII/RuIII redox potentials of 1-4 and the no. of alkyl substituents in the arene ligand. [on SciFinder(R)]
  • Publication
    Métadonnées seulement
    Synthesis, structure and electrochemistry of cationic diruthenium complexes of the type [(N-N)2Ru2(CO)2(?-CO)2(?-OOCFc)]+ containing a ferrocenecarboxylato bridge and two chelating aromatic diimine ligands
    (2007)
    Auzias, Mathieu
    ;
    ; ;
    Stepnicka, Petr
    ;
    Ludvik, Jiri
    The dinuclear bis(ferrocenecarboxylato) complex Ru2(CO)4(?-OOCFc)2(py)2 (Fc = ferrocenyl, py = pyridine) was found to react with arom. diimines (2,2'-dipyridyl, 4,4'-dimethyl-2,2'-dipyridyl, 1,10-phenanthroline, 5-nitro-1,10-phenanthroline, and 5-amino-1,10-phenanthroline) in methanol to give the cationic diruthenium complexes [(N-N)2Ru2(CO)2(?-CO)2(?-OOCFc)]+ (1: N-N = 2,2'-dipyridyl, 2: N-N = 4,4'-dimethyl-2,2'-dipyridyl, 3: N-N = 1,10-phenanthroline, 4: N-N = 5-nitro-1,10-phenanthroline, 5: N-N = 5-amino-1,10-phenanthroline), which have been isolated as the hexafluorophosphate salts. The mol. structure of 3, solved by single-crystal x-ray anal. of the tetraphenylborate salt [3][BPh4], shows a diruthenium backbone bridged by two carbonyl and by one ferrocenecarboxylato ligand, the two 1,10-phenanthroline ligands being in the axial positions. Cyclic voltammetry in dichloromethane reveals for all compds. two successive oxidns. due to ferrocene/ferrocenium redox couple and oxidn. of the diruthenium core. [on SciFinder(R)]
  • Publication
    Métadonnées seulement
    Ru2(CO)4(OOCR)2(PPh3)2 sawhorse-type complexes containing ?2-?2-carboxylato ligands derived from biologically active acids
    (2006)
    Auzias, Mathieu
    ;
    ;
    The thermal reaction of Ru3(CO)12 with the biol. active acids acetyl salicylic acid (Aspirin), ?-methyl-4-(isobutyl)phenylacetic acid (Ibuprofen) and 3?,7?,12?-trihydroxy-5?-cholanic acid (cholic acid) in refluxing THF, followed by addn. of PPh3, gives the dinuclear complexes Ru2(CO)4(OOCR)2(PPh3)2 (1: R = C6H4-2-OCOMe, 2: R = CHMe-C6H4-4-Bui, 3: C23H39O3). The single-crystal structural anal. of 1 and 2 reveals a dinuclear Ru2(CO)4 sawhorse structure, the diruthenium backbone being bridged by the carboxylato ligands, while the two phosphine ligands occupy the axial positions at the Ru atoms. However, chiral C atoms in the carboxylic acid undergo racemization during the thermal reaction. [on SciFinder(R)]
  • Publication
    Métadonnées seulement
    Dinuclear ruthenium sawhorse-type complexes containing bridging ligands with ferrocenyl substituents in endo/endo, endo/exo and exo/exo orientations
    (2006)
    Auzias, Mathieu
    ;
    ;
    Labat, Gael
    ;
    ;
    The dinuclear Ru complexes Ru2(CO)4(OOCC5H4FeC5H5)2L2 (L = py: 1, L = PPh3: 2) were synthesized from Ru3(CO)12, ferrocene carboxylic acid and pyridine or PPh3, resp. The single-crystal x-ray structure anal. reveals for 1 and 2 a Ru2(CO)4 sawhorse backbone with the two ferrocenyl substituents of the two carboxylato bridges being endo/exo with respect to each other in the solid state. With the new pyridine deriv. NC5H4OOCC5H4FeC5H5-4 (4-ferrocenoyloxypyridine) (3) as axial ligand, the complex Ru2(CO)4(OOCC5H4FeC5H5)2(NC5H4OOCC5H4FeC5H5-4)2 (4) was obtained, the single crystal x-ray structure anal. showing an exo/exo orientation of the two carboxylato bridges in the solid state. The endo/endo orientation is found in the solid-state structure of Ru2(CO)4(HNOCC5H4FeC5H5)2(PPh3)2 (5), the two OCNH bridges being transoid with respect to each other; this complex is accessible from Ru3(CO)12, ferrocenamide and PPh3. [on SciFinder(R)]