𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The structure and ring-puckering vibration of thietane as studied by 1H and 13C NMR spectra of the oriented molecule

✍ Scribed by J. Jokisaari; J. Kuonanoja; A.-M. Häkkinen


Publisher
John Wiley and Sons
Year
1980
Tongue
English
Weight
297 KB
Volume
14
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis


Abstract

The ^1^H and ^13^C NMR spectra of partially oriented thietane have been recorded and analysed. The molecular structure was determined assuming the molecule to be planar and rigid. Because of the unsatisfactory fit of the dipolar coupling constants, a model which also takes into account the ring‐puckering vibration was applied. This model leads to a better fit, but also to long CH distances. Consequently, it seems that the one‐dimensional ring‐puckering model does not on its own explain the differences between the experimental and calculated coupling constants.


📜 SIMILAR VOLUMES


The structure and intramolecular motion
✍ P. Diehl; J. Jokisaari; J. Amrein 📂 Article 📅 1980 🏛 John Wiley and Sons 🌐 English ⚖ 354 KB 👁 1 views

## Abstract The proton spectrum with ^13^C satellites of benzaldehyde oriented in a liquid crystal solvent has been analysed and the structure of the proton and carbon skeleton has been determined. The large number of observed direct couplings also allows the study of the intramolecular rotation. T

Analysis of the 1H and 13C NMR spectra o
✍ Mauricio Gomes Constantino; Kleber Thiago de Oliveira; Adilson Beatriz; Gil Vald 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 93 KB

## Abstract A detailed NMR analysis with full assignment of the ^1^H and ^13^C spectral data for two polycyclic compounds is described. These compounds are derivatives of the product obtained from the pericyclic reaction between cyclopentadiene and tropone. Peculiar intriguing conformational featur

Structural elucidation and total assignm
✍ Mary Anne M. Bandeira; F. J. de A. Matos; R. Braz-Filho 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 117 KB 👁 1 views

## Abstract Conventional 1D NMR methods and 2D shift‐correlated NMR experiments (COSY, HMQC, HMBC) were used for the structural elucidation and ^1^H and ^13^C chemical shifts assignments of four new types of chalcone dimers isolated from __Myracrodruon urundeuva__. Copyright © 2003 John Wiley & Son

Structural analysis and complete assignm
✍ David E. Minter; Alan P. Marchand; Shao-po Lu 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 441 KB 👁 1 views

## Abstract The ^1^H and ^13^C NMR spectra of ‘Thiele's ester,’ i.e. dimethyl 3α 4α, 7α, 7α‐tetrahydro‐4,7‐methano‐1H‐indene‐2,6‐dicarboxylate, have been assigned completely by using a combination of one‐ and two‐dimensional NMR techniques. The results thereby obtained afford the first unambiguous

Complete Assignment of the 1H and 13C NM
✍ Dagfinn W. Aksnes; Arne Standnes; Øyvind M. Andersen 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 286 KB 👁 2 views

Complete assignment of the 'H and I3C NMR spectra of flavone and three flavone derivatives is reported. Protonproton and carbon-proton coupling constants of the flavones, including the extreme seven-bond long-range coupling between H-7 and H-3 in 6-hydroxyflavone (0.52 Hz) and flavone (0.27 Hz), are

Towards the automatic analysis of NMR sp
✍ Lee Griffiths; Rob Horton 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 138 KB 👁 1 views

A method of comparing predicted and experimental chemical shifts was used to confirm or refute postulated structures. 1H NMR spectra returned all true positives with a false positive rate of 4%. When an analogous procedure was adopted for 13C NMR spectra, the false positive rate dropped to 1%, where