| Autor: |
Kretschmer, Matthias, Kleinpeter, E., Pulst, M., Borsdorf, R. |
| Zdroj: |
Chemical Monthly / Monatshefte für Chemie; 1983, Vol. 114 Issue 3, p289-302, 14p |
| Abstrakt: |
The rotational barriers Δ G to E,Z- and s-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 for E,s-trans and Z,s-cis isomers. The results indicate a nonbonding interaction between aldehyde oxygen and ring sulphur, favouring s-cis conformation in case of Z configuration. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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