Abstract
AbstractFrom analysis and refinement by the LAOCOON III program of the 220 MHz 1H 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 3J(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.
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