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  • x-ray structure  (2)
  • 8-aminoquinoline  (1)
  • 1995-1999  (2)
  • 1945-1949
  • 1997  (2)
  • 1
    Electronic Resource
    Electronic Resource
    X-ray and vibrational studies of 8-aminoquinoline. Evidence for a three-center hydrogen bond (1997)
    Chichester : Wiley-Blackwell
    Journal of Physical Organic Chemistry 10 (1997), S. 680-686 
    Details
    ISSN: 0894-3230
    Keywords: 8-aminoquinoline ; x-ray structure ; vibrational spectra ; three-center hydrogen bond ; Chemistry ; Theoretical, Physical and Computational Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: -The x-ray structure of 8-aminoquinoline indicates that one of the NH bonds of the NH2 group forms a three-center hydrogen bond, the major component being the intramolecular hydrogen bond and the minor component the intermolecular hydrogen bond. The IR and Raman spectra of 8-aminoquinoline and of its N-deuterated counterpart reflect the non-equivalence of the two NH(D) bonds and the weakness of the hydrogen bridge. © 1997 John Wiley & Sons, Ltd.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 2
    Electronic Resource
    Electronic Resource
    X-ray and vibrational studies of the complex between N-tert-butoxycarbonyl-L-phenylalanine and pyridine. Isotope effect (1997)
    Chichester : Wiley-Blackwell
    Journal of Physical Organic Chemistry 10 (1997), S. 825-834 
    Details
    ISSN: 0894-3230
    Keywords: N-tert-butoxycarbonyl-L-phenlylalanine-pyridine complex ; isotope effect ; x-ray structure ; vibrational spectroscopy ; Chemistry ; Theoretical, Physical and Computational Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The x-ray structure of the complex between N-tert-butoxycarbonyl-L-phenylalanine and pyridine shows that the crystals are held together by short hydrogen bonds between the OH group and the N atom of the pyridine ring [RO(H)· · ·N=2·574(3) Å]. Deuteration of the OH and NH groups results in a small expansion of the unit cell associated with an elongation of the O· · ·N distance [RO(D)· · ·N=2·610(3) Å]. The infrared spectra show very broad stretching protonic bands in the range 2750-600 cm-1. The isotopic ratio ν(OH· · ·H)/ν(OD· · ·N) of nearly unity suggests a double minimum potential with a low barrier for the hydrogen bridge. The Raman and near-infrared spectra are discussed. The perturbation of the fundamental modes and of the overtones of pyridine suggests that the complex is not of the proton transfer type. The broad absorptions of the hydrogen bridge disappear in the near-infrared region. The perturbation of the pyridine overtones is discussed. © 1997 John Wiley & Sons, Ltd.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
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    Paper (German National Licenses)
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