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Stoeckli-Evans, Helen

Nom
Stoeckli-Evans, Helen
Affiliation principale
Fonction
Professeur.e émérite
Email
helen.stoeckli-evans@unine.ch
Identifiants
https://libra.unine.ch/handle/123456789/470
_
0000-0002-9960-3869

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  • Publication
    Métadonnées seulement
    rac-(Z)-Ethyl 2-bromo-2-[(3R,5R)-3-bromo-5-methyltetrahydrofuran-2-ylidene]acetate
    (2006)
    Loiseau, Francois
    ;
    Neier, Reinhard 
    ;
    Labat, Gael
    ;
    Stoeckli-Evans, Helen 
    In Et rac-(Z)-2-bromo-2-[(3R,5R)-3-bromo-5-methyltetrahydrofuran-2-ylidene]acetate, C9H12Br2O3, a (THF-2-ylidene)acetate, the double bond has the Z form. In the THF group, the relative configuration of the Br atom in the 3-position and the Me group in the 5-position is anti. The compd. crystallizes with 2 independent mols. per asym. unit and, in the crystal structure, the individual mols. are linked to their symmetry-equiv. mols. by C-H???O H bonds, so forming centrosym. H-bonded dimers. Crystallog. data are given. [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
    ;
    Therrien, Bruno 
    ;
    Labat, Gael
    ;
    Stoeckli-Evans, Helen 
    ;
    Süss-Fink, Georg 
    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)]