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Electronic properties of the nitrosamine function.

R E Lyle, H M Fribush, G G Lyle

    IARC Scientific Publications
    |January 1, 1978
    PubMed
    Summary
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    Chiral alcohols induce detectable circular dichroism in achiral nitrosamines by forming weak complexes. This phenomenon offers new possibilities for studying nitrosamine structure using circular dichroism spectroscopy.

    Area of Science:

    • * Organic Chemistry
    • * Spectroscopy
    • * Structural Analysis

    Background:

    • * Nitrosamines are achiral compounds with symmetrical chromophores.
    • * Chiral molecules can interact with achiral molecules, potentially inducing asymmetry.
    • * Circular dichroism (CD) spectroscopy detects differences in the absorption of left and right circularly polarized light, indicating chirality.

    Purpose of the Study:

    • * To investigate the interaction between chiral alcohols and achiral nitrosamines.
    • * To determine if this interaction induces a measurable Cotton effect in CD spectra.
    • * To explore the potential of this method for structural elucidation of nitrosamines.

    Main Methods:

    • * Addition of chiral alcohols (l-menthol, R-(-)-2-octanol) to achiral nitrosamines.

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  • * Measurement of circular dichroism (CD) curves.
  • * Analysis of the concentration dependence of the induced ellipticity.

    • Main Results:

    • * A Cotton effect was observed in the CD spectra of nitrosamines upon addition of chiral alcohols.
    • * The induced circular dichroism was concentration-dependent.
    • * The results suggest the formation of a weak 1:1 complex between the nitrosamine and the chiral alcohol.

    Conclusions:

    • * Chiral alcohols can induce dissymmetric perturbations in the chromophores of achiral nitrosamines.
    • * Induced circular dichroism provides a sensitive method for detecting nitrosamine-alcohol interactions.
    • * This approach has potential applications in the structural studies of nitrosamines.