Journal ArticleDOI
Evidence for Resonance-Assisted Hydrogen Bonding from Crystal-Structure Correlations on the Enol Form of the β-Diketone Fragment
About:
This article is published in ChemInform.The article was published on 1989-05-16. It has received 58 citations till now. The article focuses on the topics: Enol & Resonance.read more
Citations
More filters
Journal ArticleDOI
Isotope effects on chemical shifts in the study of intramolecular hydrogen bonds
TL;DR: Both so-called resonance-assisted (RAHB) and non-RAHB systems are treated and the importance of RAHB will be discussed, as well as the borderline between “static” and tautomeric systems.
Journal ArticleDOI
Capturing Elusive Polymorphs of Curcumin: A Structural Characterization and Computational Study
Maria A. Matlinska,Roderick E. Wasylishen,Guy M. Bernard,Victor V. Terskikh,Andreas Brinkmann,Vladimir K. Michaelis +5 more
TL;DR: Redetermined crystal structures of forms I and II of curcumin and present 13C and 1H solid-state nuclear magnetic resonance (NMR) spectra for these two forms, as well as 13C–1H two-dimensional heteronuclear correlation (HETCOR) data.
Journal ArticleDOI
Interference of H-bonding and substituent effects in nitro- and hydroxy-substituted salicylaldehydes
Aneta Jezierska-Mazzarello,Halina Szatylowicz,Tadeusz M. Krygowski,Tadeusz M. Krygowski,Tadeusz M. Krygowski +4 more
TL;DR: It is shown that substituents (NO2 or OH) in the para or meta position with respect to either OH or CHO in H-bonded systems interact more strongly than in the case of di-substituted species.
Journal ArticleDOI
NMR structural study of the prototropic equilibrium in solution of Schiff bases as model compounds.
David Ortegón-Reyna,Cesar Garcias-Morales,Itzia I. Padilla-Martínez,Efrén V. García-Báez,Armando Ariza-Castolo,Ana Lilia Peraza-Campos,Francisco J. Martínez-Martínez +6 more
TL;DR: The Henderson–Hasselbalch data analysis indicated that the systems are weakly acidic, and the predominant NHO equilibrium was established using Polster–Lachmann δ-diagram analysis and Perrin model data linearization.
Journal ArticleDOI
RAHB concept and σ-skeleton in some oximes of 3-hydroxy fulvene; DFT, AIM, ELF and NBO studies
TL;DR: In this article, the resonance-assisted hydrogen bond concept and influence of σ-skeleton of the molecule on the intramolecular hydrogen bonds (IHB) of some substituted oxime derivatives of 3-hydroxy fulvene have been evaluated by use of atoms in molecules, electron localization function and natural bond orbital and geometrical analyses.