✦ LIBER ✦

17O NMR study of steric hindrance in methoxylated flavones. Substitution on the phenyl ring and the heterocycle

✍ Scribed by Jean-Claude Wallet; Emile M. Gaydou; M. T. Cung

Publisher: John Wiley and Sons
Year: 1990
Tongue: English
Weight: 212 KB
Volume: 28
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1260280616

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Natural abundance ^17^O NMR spectra were recorded for ten methoxyflavones and one flavonol. The chemical shifts are discussed in terms of steric and conformational changes. They are related to previously reported ^13^C NMR data.

📜 SIMILAR VOLUMES

13C, 17O and 55Mn NMR studies on substit

13C, 17O and 55Mn NMR studies on substituted manganese carbonyl complexes. A contribution to the mechanism of demetalation reactions

✍ Daniel Rentsch; Lilan Nill; Wolfgang von Philipsborn; D. Richard Sidler; Philip 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 297 KB 👁 1 views

13C and 17O chemical shifts and 55Mn,13C coupling constants of nine pentacarbonylmanganese complexes (6È14), 13 tetracarbonylmanganese complexes (15È27) and Ðve tetra-RMn(CO) 5 RMn(CO) 4 PR 3 @ carbonylmanganacycle complexes (1aÈe) were determined and are discussed in terms of p-inductive substituen

Synthesis, Variable Temperature and Pres

Synthesis, Variable Temperature and Pressure 17O NMR Study of Bis(alkylamide) Derivatives of [(Gd-DTPA)(H2O)]2− − An Assessment of the Substitution Effect on Water Exchange Kinetics

✍ François Botteman; Gaëlle M. Nicolle; Luce Vander Elst; Sophie Laurent; André E. 📂 Article 📅 2002 🏛 John Wiley and Sons 🌐 English ⚖ 178 KB 👁 2 views

The impact of tripodal chelates on water

The impact of tripodal chelates on water exchange kinetics and mechanisms: A variable temperature and pressure 17O NMR study to clarify the structure-reactivity relationship in [FeII(L)(H2O)2]− complexes

✍ Joachim Maigut; Roland Meier; Achim Zahl; Rudi van Eldik 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 177 KB 👁 1 views

ChemInform Abstract: Substituent Influen

ChemInform Abstract: Substituent Influences on the Stability of the Ring and Chain Tautomers in 1,3-O,N-Heterocyclic Systems: Characterization by 13C NMR Chemical Shifts, PM3 Charge Densities, and Isodesmic Reactions

✍ Kari Neuvonen; Ferenc Fueloep; Helmi Neuvonen; Andreas Koch; Erich Kleinpeter; K 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 31 KB 👁 2 views

Studies on Azole-to-Azole Interconversio

Studies on Azole-to-Azole Interconversion − An Interesting Case of Absence of a “Primary Steric Effect” in the Ring-Degenerate Equilibration between ortho-Substituted 3-Aroylamino-5-methyl-1,2,4-oxadiazoles and 3-Acetylamino-5-aryl-1,2,4-oxadiazoles in Methanol

✍ Silvestre Buscemi; Vincenzo Frenna; Andrea Pace; Nicolò Vivona; Barbara Cosimell 📂 Article 📅 2002 🏛 John Wiley and Sons 🌐 English ⚖ 264 KB 👁 2 views