Browsing by Author "eb0bc4d5-02fe-40d6-9be6-be57c0b1e9d9"

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    • Absolute Configuration of a Tetrachloro Monoterpene from Plocamium cartilagineum 
      Rivera Latorre, Augusto; Manríquez Castro, Víctor; Wittke, Oscar (International Union of Crystallography, 1998-06-15)
      The molecular structure of the naturally occurring title compound, 2,4,5-trichloro-1-chloroethenyl-1,5-dimethylcyclohexane, C10H14Cl4, consists of a cyclohexane ring in a chair conformation with three Cl atoms, two tertiary ...
    • Azorellanol: A diterpenoid with a new carbon skeleton from Azorella compacta 
      Loyola, Luis Alberto; Bórquez, Jorge; Morales, Glauco; San Martín Barrientos, Aurelio; Manríquez, Víctor; Wittke, Oscar (Elsevier Ltd, 1998)
      A new diterpenoid, azorellanol (5), was isolated from the whole plant of Azorella compacta (Umbelliferae). The stricture was established by using mainly one- and two-dimensional NMR techniques, whereas the absolute ...
    • IR AND 13C-NMR SPECTRAL PROPERTIES OF THE LAYERED INCLUSION COMPOUND BIS(THIOUREA)HEXAMETHYLENETETRAMINE 
      Jara Vergara, Paul; González Moraga, Guillermo; Manríquez Castro, Víctor; Wittke, Oscar; Yutronic Sáez, Nicolás (Sociedad Química Chilena, 2003-10-02)
      The structure of the 1: 2 adduct of hexamethylenetetramine and thiaurea was reanalyzed reinterpreting X-ray diffractian data and providing additianal IR and NMRspectrascapic features. The praduct is thus described as ...
    • Spectra and structure of polyamine-copper(II) complexes. Infrared spectrum and normal coordinate calculations ... 
      Díaz, Guillermo; Diez, Sylvia; López, Luis; Muñoz, René; Campos Vallette, Marcelo; Manríquez, Víctor; Wittke, Oscar (1993)
      The infrared spectrum of mono(diethylenetriamine)copper(II) nitrate has been obtained in the frequency range 4000-80 cm-1. Assignments of fundamental frequencies in the coordination site, as well as in the free and bonded ...