## Abstract The protonโproton coupling constants in cyclopentadiene, cyclohexadiene, cycloheptatriene, cyclooctatetraene, cyclopentene and cyclohexene have been calculated using the finite perturbation INDO method. The carbon geometry was taken from the corresponding electron diffraction studies. T
Proton spin coupling constants in methylcyclopentadienes
โ Scribed by V. I. Mstislavsky; V. A. Korenevsky; N. M. Sergeyev; V. N. Solkan
- Publisher
- John Wiley and Sons
- Year
- 1976
- Tongue
- English
- Weight
- 733 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
โฆ Synopsis
Abstract
A detailed procedure for analysing the ^1^H n.m.r. spectra of two isomeric methylcyclopentadienes, two dimethylcyclopentadienes and 3โmethylindene is reported. Finite perturbation INDO calculations are used to discuss the conformational features of the long range proton coupling constants.
๐ SIMILAR VOLUMES
## Abstract Carbonโ13, proton coupling constants have been measured in eighteen different 2โsubstituted propanes. ^1^__J__(Cโ2,H) shows variations similar to those observed previously for monosubstituted methanes. ^2^__J__(Cโ2,H) is essentially independent of the substituent at Cโ2, while ^2^__J__(
A new method is shown to determine C,C spin coupling constants in C 2 symmetric molecules by using proton detection with gradient selected 2QHMBC. It is shown that the pulse sequence proposed distinguishes between symmetric and antisymmetric eigenfunctions of the AAXX spin system.