Conclusions
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1.
The fragmentation of cyclopropylthiophene, and of its methyl and acetyl derivatives, with substituants in the 1 and 2 positions of the three-membered ring, begins with the cleav. age of the H, CH3, or COCH3 radicals. The further decomposition of the formed ions reduces to the cleavage of the H2, C2H2, and CH3O=CH molecules and the S atom.
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3.
The differences between the mass spectra of the cyclopropylthiophenes and their isomeric olefins are expressed only in the intensities of the peaks.
Literature cited
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8, pp. 1908–1910, August, 1983.
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Kadentsev, V.I., Kolotyrkina, N.G., Shostakovskii, V.M. et al. Mass spectra of electron impact of methyl- and acetylcyclopropylthiophenes. Russ Chem Bull 32, 1731–1734 (1983). https://doi.org/10.1007/BF00954310
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DOI: https://doi.org/10.1007/BF00954310