Tautomeric Equilibria in Relation to Pi-Electron Delocalization
β Scribed by Ewa Daniela Raczynska; Wanda Kosinska; Borys Osmialowski; Ryszard Gawinecki
- Publisher
- John Wiley and Sons
- Year
- 2006
- Weight
- 8 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0931-7597
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π SIMILAR VOLUMES
Discussions of "aromaticity" of cyclic conjugated molecules have invoked a variety of criteria for the estimation of the extent of V-electron delocalization. ' c., 82, 5816 (1960).
Chain-length-dependent a electron delocalization is analyzed in pristine oligofurans and polyfuran by means of Fourier transform Raman spectroscopy. Neutral polyfuran shows a large frequency dispersion with conjugation length and it has not yet reached saturation at the level of the hexamer. In spit
The condensation of &-(1) and trans-2-hydroxymethyl-4-cyclohexenvl-l-amine (21 and 2,3-w- (3) cyclo?2.2.l]heptyl&nine (4j and 2,3-d.&&-3\_hydroxymethylbiwith 8 -different-aromatic aldehydes led to ring-chain tautomeric equilibria between epimeric tetrahydro-1,3-oxazines and open-chain Schiff bases.