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Kombinierte d-NMR- und LIS-Untersuchungen zum konformativen Verhalten von Formylmethylenthiopyranen

Conformations of formylmethylenthiopyranes—d-NMR and LIS investigations

  • Organische Chemie Und Biochemie
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Monatshefte für Chemie / Chemical Monthly Aims and scope Submit manuscript

Abstract

The rotational barriers ΔG ≠ toE,Z- ands-cis, s-trans-isomerisation in formylmethylenthiopyranes are determined and discussed with regard to their dependence on substituent effects. Preferential conformers are distinguished by lanthanide induced shifts. Best fits between calculated and experimental shifts are obtained forE,s-trans andZ,s-cis isomers. The results indicate a nonbonding interaction between aldehyde oxygen and ring sulphur, favourings-cis conformation in case ofZ configuration.

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Authors and Affiliations

  1. Sektion Chemie, Karl-Marx-Universität Leipzig, DDR-7010, Leipzig, Deutsche Demokratische Republik

    Matthias Kretschmer, E. Kleinpeter, M. Pulst & R. Borsdorf

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  1. Matthias Kretschmer
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  2. E. Kleinpeter
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  3. M. Pulst
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  4. R. Borsdorf
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Kretschmer, M., Kleinpeter, E., Pulst, M. et al. Kombinierte d-NMR- und LIS-Untersuchungen zum konformativen Verhalten von Formylmethylenthiopyranen. Monatsh Chem 114, 289–302 (1983). https://doi.org/10.1007/BF00798952

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  • DOI: https://doi.org/10.1007/BF00798952

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