Proton-proton coupling constants in the unsubstituted pyrylium cation
β Scribed by L. Radics; Julia Kardos
- Publisher
- John Wiley and Sons
- Year
- 1973
- Tongue
- English
- Weight
- 180 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0749-1581
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β¦ Synopsis
Abstract
An iterative analysis of the PMR spectrum of the title compound was performed and the calculated values of spectral parameters, relative chemical shifts, protonβproton and direct carbonβproton couplings are compared with those of pyridine.
π SIMILAR VOLUMES
## Abstract A detailed procedure for analysing the ^1^H n.m.r. spectra of two isomeric methylcyclopentadienes, two dimethylcyclopentadienes and 3βmethylindene is reported. Finite perturbation INDO calculations are used to discuss the conformational features of the long range proton coupling constan
## Abstract The protonβproton 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
KNOWLEDGE of the effects of amine substituents on chemical shifts and coupling constants is important in elucidating the distributions of dissociable protons and rotamers in amino acids and other amine compounds at various pH values. In previous studies of 2,5-dimethylpiperazine and its hydrochlorid