13 C NMR Studies of some Bicyclo[2.2.2]Octanones. a Characterization of the Isomeric 1,5,5,8-Tetramethylbicyclo[2.2.2]Octan-2-Ones

@inproceedings{Stephens197413CN,
  title={13 C NMR Studies of some Bicyclo[2.2.2]Octanones. a Characterization of the Isomeric 1,5,5,8-Tetramethylbicyclo[2.2.2]Octan-2-Ones},
  author={K. R. Stephens and J. Stothers and C. T. Tan},
  year={1974}
}
  • K. R. Stephens, J. Stothers, C. T. Tan
  • Published 1974
  • Chemistry
  • The 13C nmr spectra of a series of sixteen bicyclo[2.2.2]octenones and octanones have been determined to examine the variation of 13C shieldings with methyl substitution. The well-defined effects arising from 1,4-nonbonded interactions are apparent and are useful for stereochemical assignments. Evidence is presented to show that closely neighboring ´ carbons experience deshielding effects, in sharp contrast to the influence of steric crowding on y carbons. The 13C shieldings observed for 1,5,8… CONTINUE READING
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