✦ LIBER ✦

A 7Li NMR investigation of the structure and ring currents in some aromatic dianion systems

✍ Scribed by Richard H. Cox; Harold W. Terry Jr.; Lester W. Harrison

Publisher: Elsevier Science
Year: 1971
Tongue: French
Weight: 253 KB
Volume: 12
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(01)97623-3

No coin nor oath required. For personal study only.

✦ Synopsis

Recently

, in an investigation of the poton nmr spectra of some arormtic dianions' it wus reported that the proton chemicrrl shifts did not correlate well with the electron density of the attached carbon atoms as has been observed in other arowtic systems. 2 It was suggested that the high field shifts observed in these dianions could possibly result from these d-anions possessing induced pammagnetic ring currents, even though some of the dianions are formally 4n + 2 telectron systems. Since we have shown peviously that information

📜 SIMILAR VOLUMES

Structural investigation of aryllithium

Structural investigation of aryllithium clusters in solution I. A 13C and 7Li NMR study of phenyllithium and some methyl-substituted phenyllithium derivatives

✍ Erik Wehman; Johann T.B.H. Jastrzebski; Jan-Meine Ernsting; David M. Grove; Gera 📂 Article 📅 1988 🏛 Elsevier Science 🌐 English ⚖ 856 KB

A 7Li NMR investigation of the ion pairs

A 7Li NMR investigation of the ion pairs Li+/.ON(SO3)22− and Li+/Mn(D2O)62+ in D2O solution

✍ P.H. Fries; J. Rendell; E.E. Burnell; G.N. Patey 📂 Article 📅 1986 🏛 Elsevier Science 🌐 English ⚖ 648 KB

A comparative analysis of the electrosta

A comparative analysis of the electrostatic potentials of some structural analogues of 2,3,7,8-tetrachlorodibenzo-p-dioxin and of related aromatic systems

✍ Jane S. Murray; Patricia Evans; Peter Politzer 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 871 KB

## Abstract We have carried out an ab initio STO‐5G computational analysis of the electrostatic potentials of four structural analogues of the highly toxic 2,3,7,8‐tetrachlorodibenzo‐__p__‐dioxin (TCDD) and four related aromatic systems benzo[a]pyrene, benz[a]anthracene, and two isomeric benzoflavo

Investigations into conformation on non-

Investigations into conformation on non-aromatic ring compounds—XI. Coupling constants in some cis-2-3disubstituted-1,4-dioxans; A reassignment of the structure of trans-naphthodioxan

✍ C. Altona; E. Havinga 📂 Article 📅 1967 🏛 Elsevier Science 🌐 French ⚖ 44 KB

NMR and conformational studies of the cy

NMR and conformational studies of the cyclobutane ring involved in the bicyclo [4.2.0]octane system of a tetracyclic diterpene structure

✍ Duc Do Khac Manh; Marcel Fetizon; Chantal Prévost; Pierre Roy 📂 Article 📅 1991 🏛 John Wiley and Sons 🌐 English ⚖ 528 KB

## Abstract Conformational studies were performed on the bicyclo [4.2.0] octane system of a series of related tetracyclic diterpenes, using molecular mechanics and ^1^H NMR. Both methods gave compatible results, but did not permit the deduction of any quantitative relationship linking the vicinal c

The Intramolecular Interaction of Thioph

The Intramolecular Interaction of Thiophene and Furan with Aromatic and Fluoroaromatic Systems in Some [3.3]Meta(heterocyclo)paracyclophanes: A Combined Computational and NMR Spectroscopic Study

✍ Maurizio Benaglia; Franco Cozzi; Michele Mancinelli; Andrea Mazzanti 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 English ⚖ 582 KB

## Abstract Four thiophene‐ and furan‐containing [3.3]meta(heterocyclo)paracyclophanes were designed and synthesized to study the intramolecular interaction between standard heteroaromatic rings and tetra‐H‐ or tetra‐F‐substituted benzenes. A complete conformational analysis, carried out by DFT cal