Desolvation and substituent effects in edge-to-face aromatic interactions
نویسندگان
چکیده
منابع مشابه
Substituent effects on the aromatic edge-to-face interaction.
Substituent effects on the folding equilibrium of molecular torsion balances are rationalised on the basis of changes in the electrostatic interactions, the exchange repulsion, and the dispersive contributions to the interaction free enthalpy.
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Synthetic supramolecular zipper complexes have been used to quantify substituent effects on the free energies of aromatic stacking interactions. The conformational properties of the complexes have been characterised using NMR spectroscopy in CDCl(3), and by comparison with the solid state structures of model compounds. The structural similarity of the complexes makes it possible to apply the do...
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In order to investigate the effect of cytosine base upon the stacking interaction of N7-quarternized guanine base with tryptophan indole ring, the X-ray crystal structure of a 1:1 complex of model compounds 1 and 2 was carried out. Contrary to the expectation of the interaction of both molecules in aqueous solution, the crystal structure showed the first example of the simultaneous recognition ...
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Three tricyclic 1,2-dioxetane derivatives, 1a, 2a and 3a were synthesized from their corresponding 1,4-dioxin acenaphthylene compounds, 1, 2 and 3, by reaction with singlet-oxygen ((1) O2 ) in dichloromethane. Evidence for the formation of the dioxetanes 1a, 2a and 3a is provided by the chemiluminescence (CL) that corresponds to the emission from the electronically excited diesters 1b*, 2b* and...
متن کاملA New Example of Edge-to-Face Interaction of Aromatic Rings in Oligopeptides: Cyclolinopeptide A
The analysis o f the arom atic region o f 'H and 13C N M R spectra o f cyclolinopeptide A (cyclic nonapeptide with the sequence c ( P r o P r o P h e P h e L e u I l e I l e L e u V a l ) , (CLA)) shows tha t Phe-3 and Phe-4 arom atic rings are oriented nearly perpendicularly to each o ther, form ing edge-to-face pair. It signifies the strong lim itation o f the free ro ta tion of arom atic res...
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ژورنال
عنوان ژورنال: Chemical Communications
سال: 2009
ISSN: 1359-7345,1364-548X
DOI: 10.1039/b902351h