Browsing by Author "1956b15a-2358-40cc-b55a-de575eff3c6b"

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    • Band shift in chromium(III) complexes with mixed ligands: molecular orbital approach 
      Bunel Torrealba, Sergio; Ibarra, Carmen; Adán, L. (Pergamon Press, 1969)
      The shift of the first and second spin allowed bands due to the stepwise replacement of the nitrogen atoms in a complex of Cr(III) of the CrN6 type of oxigen atoms of water or of carboxylic groups is analized in terms of ...
    • Charge transfer circular dichroism of complexes of copper(II) with aminoacids and heterocyclic ligands 
      Bunel Torrealba, Sergio; Ibarra, Carmen; Bunton, Clifford A. (Pergamon Press, 1975)
      In the u.v. region the C.D. spectra of mixed complexes of Cu(II), aminoacids and heterocyclic ligands depend upon the nature of the heterocyclic ligand, and work on the Cotton effects of bis-Ł-aminoacidates of cu(II) in ...
    • Complexation of amino sugars with cobalt(III) bis (phenanthroline) 
      Bunel Torrealba, Sergio; Ibarra, Carmen; Moraga, Exequiel; Parada Aliste, José; Blasko, Andrei; Whiddon, Christy; Bunton, Clifford A. (Elsevier, 1998)
      The I3- salts soluble in acetone and sparingly so in methanol, and I3- inhibits formation of Co(II) so that minor decomposition of acomplex does not broaden its 1H NMR signals. The (phen)2 complex of Co(III) with D-glucosamine ...
    • Complexation of sucrose with cobalt(III)bis(phenanthroline) 
      Parada Aliste, José; Bunel Torrealba, Sergio; Ibarra, Carmen; Larrazábal Rojas, Guillermo; Moraga, Exequiel; Gillitt, N. D.; Bunton, Clifford A. (ELSEVIER SCI LTD, 2000-10-20)
      The Delta-[Co(III)bis(phenanthroline)(sucrose)](3+) complex forms with little perturbation of the sucrose conformation, and complexation by HO-2(g) and HO-1(f).
    • Mixed complexes of cobalt(III) with phenanthroline and galactose or arabinose 
      Parada Aliste, José; Bunel Torrealba, Sergio; Moraga, Exequiel; Ibarra, Carmen; Gillitt, Nicholas D.; Bunton, Clifford A. (2001)
      Mixed complexes of bis-phenanthroline cobalt(III) and α-D-galactose or β-D- or L-arabinose are identified in aqueous solution from their 1H NMR and circular dichroism (CD) spectra. Galactose forms only the Δ-complex, but ...
    • Optical activity of compounds formed by amino-complexes of Co(III) and carbohydrates-I 
      Bunel Torrealba, Sergio; Ibarra, Carmen (Pergamon Press, 1985)
      The preparation of aminocomplexes of Co(III) containing D-ribose, L-sorbose or D-glucosamine as second ligand is described. Their spectral features and optical activity are reported. Formation in solution of complex ...
    • Stereoselective synthesis of dodecaammine-ì-hexoltetracobalt(III) in carbohydrates solution Sintesis ... 
      Larrazábal Rojas, Guillermo; Bunel Torrealba, Sergio; Ibarra, Carmen; Parada Aliste, José (2002)
      Reaction between cis-[Co(NH3)(H2O)(2)](3-) and ammonia in aqueous solution, in the presence of a carbohydrate, leads to the formation of the tetranuclear complex of cobalt (III): [Co-4(NH3)(12)(OH)(6)](6+) partially resolved. ...
    • Sucrose bis(1,10-phenanthroline)cobalt (III). Predicted distortion at the octahedral center 
      Parada Aliste, José; Bunel Torrealba, Sergio; Ibarra, Carmen; Larrazábal Rojas, Guillermo; Gillitt, N. D.; Bunton, Clifford A. (PERGAMON-ELSEVIER SCIENCE LTD, 2002-10-01)
      The two 1,10-phenanthroline ligands in the mixed Delta-cobalt(III) complex with sucrose are in different environments relative to the sucrose ligand as shown by differences in their H-1 NMR signals and predicted by structural ...