Mesophase from electrode-binder coal-tar pitch: An appraisal of structural techniques

Drake, J. A. G.; Jones, D. W.; Mason, Clifford R.

doi:10.1002/jctb.280310172

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Analysis Of Spectra1

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1982

1983

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“…see Ref. 4), and iso-quinoline5 have received appreciable NMR study. Less is known of the NMR spectra of 2,2'-biquinoline(1) (or 2,2'-biquinolyl) which may, like 2,2'-binaphthyl (identified in a coal-tar fraction by Lang et d6), be present in some tars.…”

Section: Analysis Of Spectramentioning

confidence: 99%

High resolution ¹H NMR spectra of 2,2′‐biquinoline

Drake

Jones

1982

Org. Magn. Reson.

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From analysis and refinement by the LAOCOON III program of the 220-'H spectrum of 52'-biquinoline, recorded as a saturated solution in carbon disdphide, most derived chemical shifts and coupling constants are close to corresponding values in quinoline. However, H-3 is at 1.5ppm lower field in 2,2'-biquinoline than in quinoliie and the orfho-coupling "434) in the heterocyclic ring is 0.5 Hz larger in 2,2'-biquinoline than in quinoline; fairly free rotation about the 2,2' bond is inferred.

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Section: Analysis Of Spectramentioning

confidence: 99%