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Mass spectra of substituted bicyclo[3.2.0]-hept-6-en-2-ones

Conclusions

  1. 1.

    Mass spectroscopy has been used to obtain definite structures for the photocyclo-adducts of cyclo-pentanone and cyclohexanone with monosubstituted acetylene derivatives.

  2. 2.

    Principal fragmentation patterns have been developed for the 7-alkyl- (Ia-c), 6-alkyl- (IIa-c), and 1-alkyl- (IIIa-c) substituted bicyclo[3.2.0]hept-6-en-2-ones; it is suggested that the molecular ions of (IIa-c) and (IIIa-c) undergo a (IIa-c) ⇌ (IIIa-c) interconversion in the photoexcited state.

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Literature cited

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Additional information

Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8, pp. 1798–1806, August, 1977.

The authors wish to thank B. V. Rozynov who prepared the high-resolution spectra.

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Serebryakov, É.P., Kulomzina, S.D., Margaryan, A.K. et al. Mass spectra of substituted bicyclo[3.2.0]-hept-6-en-2-ones. Russ Chem Bull 26, 1660–1666 (1977). https://doi.org/10.1007/BF00925171

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Keywords

  • Spectroscopy
  • Mass Spectroscopy
  • Mass Spectrum
  • Acetylene
  • Cyclohexanone