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Protonenresonanz-Untersuchungen zur inneren Rotation 10. Konformation und Stereodynamik dipolarer cyclischer Enamine und Hydrazone

Kölle, Ulrich ; Kolb, Bernd ; Mannschreck, Albrecht


2-Aminomethylene and 2-hydrazono derivatives 1–6 of carbocyclic and heterocyclic 1,3-dicarbonyl compounds which may form up to four rotational diastereoisomers were investigated by 1H and 13C NMR spectroscopy. The isomeric compositions of the crystalline compounds can be deduced from the 1H signals of equilibrating solutions. Free enthalpies of activation for rotation about the CN and CC bonds of ...


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