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  • Digitale Medien  (2)
  • 1980-1984  (2)
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Materialart
  • Digitale Medien  (2)
Erscheinungszeitraum
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Schlagwörter
  • 1
    Digitale Medien
    Digitale Medien
    The individual CH bond as a Raman spectroscopic probe to the internal rotation of the CHCl2 Group in C6H5CHCl2 (1984)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 15 (1984), S. 224-231 
    Details
    ISSN: 0377-0486
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: Evidence is provided concerning the internal rotation of the CHCl2 group in the C6H5CHCl2 molecule in the condensed phase using mainly the Raman spectra of the alkylic carbon-hydrogen stretching vibration of C6H5CHCl2 and its deuteriated analogues. Comparison of the Raman bands observed in the region of the CH stretching vibrations for the hydrogenated compound with its deuteriated derivatives allows the assingnment of two Raman bands to the C—H vibrator of the CHCl2 group. The dependence of the profiles of these bands on temperature and dilution in a series of solvents suggests a conformational equilibrium. Comparision of two different theoretical treatments of the isolated molecule enables us to reconize the importance of non-boarded interactions operating during the internal rotation of the dichloromethyl group. The experimental results, used together woth the theoretical studies, lead to the evidence for two probable rotational isomers, designated CH⊥ and CH‖ which are responsible for the two observed Raman bands.
    Zusätzliches Material: 14 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/jrs.1250150404
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    A Raman spectroscopic study of molecular interaction in long-chain primary amines systems (1982)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 13 (1982), S. 56-62 
    Details
    ISSN: 0377-0486
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: The N—H, C—H and C—C stretching regions at 3100-3400 cm-1, 2800-3000 cm-1 and 1000-1150 cm-1, respectively, and the low-frequency accordion-like vibration region, have been investigated by Raman spectroscopy for the octyl-, nonyl-, dodecyl-, tetradecyl- and hexadecyl-normal primary amines series, at different temperatures and for different physical states. The spectra were interpreted in terms of structural changes, particularly of the conformations of the paraffin chains, the chain length and the physical state. The changes in the N—H region were associated mainly with molecular association, whereas the changes in the other spectral regions studied were associated mainly with the molecular packing of the chains.
    Zusätzliches Material: 9 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/jrs.1250130111
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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    Artikel (Nationallizenzen)
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