Browsing by Author "XX676212"

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    • 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).
    • Complexes of Co(III) with L-sorbose and phenanthroline 
      Blasko, Andrei; Bunton, Clifford A.; Moraga, Exequiel; Bunel Torrealba, Sergio; Ibarra, Carmen (ELSEVIER SCIENCE BV, 1995-12-20)
      L-Sorbose and two molecules of 1,10-phenanthroline form a complex with Co(III) which has the Lambda configuration about Co(III), based on CD and ORD spectra, The H-1 NMR signals of alpha-L-sorbopyranose and its mixed ...
    • COMPLEXES OF COBALT(III) WITH D-FRUCTOSE AND PHENANTHROLINE 
      Moraga, Exequiel; Bunel Torrealba, Sergio; Ibarra, Carmen; Blasko, Andrei; Bunton, Clifford A. (ELSEVIER SCIENCE BV, 1995-03-01)
      D-Fructose and 1,10-phenanthroline form complexes with Co(III). Configurations about Co(III) are assigned from the CD and ORD spectra of the separated Lambda and Delta diastereomers, and Lambda strongly predominates in the ...
    • Determination of acid dissociation constants of anomers of amino sugars by 1H NMR spectroscopy 
      Blasko, Andrei; Bunton, Clifford A.; Bunel Torrealba, Sergio; Ibarra, Carmen; Moraga, Exequiel (Elsevier Science Publishers B. V., 1997)
      Acid dissociation constants of α- and β-D-glucos-, mannos-, and galactos-ammonium ions have been determined from 1H NMR chemical shifts of the individual anomers in D2O. Values of pKa(D) for the α- and β-ammonium ions ...
    • Laboratorio de nuevas métricas en Ethernet 
      Rousseau Frey, Ávaro Cristián (Universidad de Chile, 2013)
      En la actualidad la tendencia en redes de transporte de datos es usar tecnologías Ethernet, las que se emplean a nivel de usuarios y proveedores de servicios de comunicaciones. Por eso es tan importante disponer de mecanismos ...
    • Optical activity of nickel(II) and copper(II) complexes with L-aminoacids in the UV spectral region 
      Ibarra, Carmen; Soto, R.; Adán, L.; Decinti Weiss, Emilio; Bunel Torrealba, Sergio (Elsevier Sequoia, 1972)
      Complexes of Cu(II) and Ni(II) with L-aminoacids have been prepared and their UV spectra and optical activity studied. The results are interpreted in terms of the conformation of the chelated rings. A molecular orbital ...
    • Stereoselective synthesis of dodecaammine-i-hexoltetracobalt(III) in carbohydrates solution 
      Larrazábal Rojas, Guillermo; Bunel Torrealba, Sergio; Ibarra, Carmen; Parada Aliste, José (SOCIEDAD CHILENA DE QUIMICA, 2002-03)
      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 ...