Fourier Transform Infrared/Raman Differentiation and Characterization of Cis- and Trans-2,5-Dimethoxy-4,β-Dimethyl-β'-Nitrostyrenes: Precursors to the Street Drug STP

    Volume 37, Issue 2 (March 1992)

    ISSN: 0022-1198

    CODEN: JFSOAD

    Page Count: 10


    By, A
    Research scientists and Head, Spectroscopy Section, Bureau of Drug Research. Health Protection Branch, Health and Welfare Canada, Ottawa, Ontario

    Neville, GA
    Research scientists and Head, Spectroscopy Section, Bureau of Drug Research. Health Protection Branch, Health and Welfare Canada, Ottawa, Ontario

    Shurvell, HF
    Professor, Queens's University, Kingston, Ontario

    (Received 13 June 1991; accepted 31 July 1991)

    Abstract

    Fourier transform Raman and infrared spectra of pure cis(Z)- and trans(E)- 2,5-dimethoxy-4,β-dimethyl-β-nitrostyrene (precursors of the psychotomimetic street drug STP or DOM) were recorded in the solid state. The spectra show characteristic features of the ethylene moiety and of the aryl and nitro substituents which permit ready differentiation and identification of these isomers. A very strong Raman line at 1670 cm−1 from the cis isomer for the C=C stretching mode, in comparison with a strong Raman line at 1641 cm−1 for the trans isomer, affords primary differentiation of these substances. A second characteristic, of both the Raman and infrared (IR) spectra, is that the frequency of the strong symmetric nitro (NO2) stretching band is about 40 cm−1 higher in the cis (1346 cm−1) than the trans isomer (1301 cm−1). All major IR and Raman bands are reported and given vibrational assignments.


    Paper ID: JFS13258J

    DOI: 10.1520/JFS13258J

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    Title Fourier Transform Infrared/Raman Differentiation and Characterization of Cis- and Trans-2,5-Dimethoxy-4,β-Dimethyl-β'-Nitrostyrenes: Precursors to the Street Drug STP
    Symposium , 0000-00-00
    Committee E30