13C‐ and 1H‐NMR. Spectra of ortho‐benzoquinones. On the assignment problem in 13C spectra
- 31 January 1973
- journal article
- research article
- Published by Wiley in Helvetica Chimica Acta
- Vol. 56 (1) , 320-322
- https://doi.org/10.1002/hlca.19730560123
Abstract
13C‐ and 1H‐NMR. spectra of ortho‐benzoquinone 1 and its methyl derivatives have been analysed. By means of heteronuclear double resonance experiments it is shown that assignments given in the literature for the olefinic carbon resonances of 1 and of a series of substituted ortho‐benzoquinones have to be inverted. 13C‐carbonyl frequencies of various six‐membered cyclic ketones are presented.Keywords
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