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High resolution 1 H NMR spectra of 2,2′‐biquinoline
Author(s) -
Drake J. A. G.,
Jones D. W.
Publication year - 1982
Publication title -
organic magnetic resonance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0030-4921
DOI - 10.1002/mrc.1270180110
Subject(s) - quinoline , chemistry , ring (chemistry) , spectral line , chemical shift , carbon 13 nmr , coupling constant , crystallography , nmr spectra database , rotation (mathematics) , stereochemistry , organic chemistry , physics , mathematics , geometry , particle physics , astronomy
From analysis and refinement by the LAOCOON III program of the 220 MHz 1 H spectrum of 2,2′‐biquinoline, recorded as a saturated solution in carbon disulphide, most derived chemical shifts and coupling constants are close to corresponding values in quinoline. However, H‐3 is at 1.5 ppm lower field in 2,2′‐biquinoline than in quinoline and the ortho ‐coupling 3 J (34) 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.