Anisotropic effects in α-substituted methoxystilbenes
| Autor: | Brian Jaques, Keith W. Blake |
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| Rok vydání: | 1973 |
| Předmět: | |
| Zdroj: | J. Chem. Soc., Perkin Trans. 2. :1660-1663 |
| ISSN: | 1364-5471 0300-9580 |
| DOI: | 10.1039/p29730001660 |
| Popis: | The relative upfield chemical shift of a meta-substituted methoxy-group upon one of the rings of a cis-stilbene gives an indication of the conformational preferences of the molecule. In E-α-nitrostilbenes the β ring spends more time than the α ring in planarity with the olefin bridge. In E-3-benzylideneindole-2(3H)-ones the arylidene ring does not achieve planarity with the indolone. Assignments of configuration to the 3′,4′-dimethoxy α-nitrostilbenes and the 3′,4′-methylenedioxy-analogues have been corrected. |
| Databáze: | OpenAIRE |
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