## Abstract The 220 MHz proton magnetic resonance spectrum of 4‐methyl‐1,3‐oxathiolane was recorded and analysed. The methyl and ethanic protons form an ABXM~3~ system, the analysis of which was carried out through several ‘trial‐and‐error’ attempts. This part of the spectrum is an interesting exam
Determination of the conformation of 1,4-diheterocyclanes. I—The 1H n.m.r. spectrum and ring conformation of 3-methyl-2-oxo-1,4-dioxepane
✍ Scribed by Pertti Äyräs; Annikki Partanen
- Publisher
- John Wiley and Sons
- Year
- 1977
- Tongue
- English
- Weight
- 245 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
The ^1^H n.m.r. spectrum of 3‐methyl‐2‐oxo‐1,4‐dioxepane was recorded at 300 and 60 MHz. The ring conformation was considered in terms of the spectral parameters and shown to be a twisted boat where the lactone grouping is approximately planar.
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## Abstract Seven isomeric 4,5,6‐trimethyl‐2‐oxo‐1,3,2‐dioxathians, __cis__‐4‐__trans__‐6‐dimethyl‐__r__‐2‐oxo‐1,3,2‐dioxathian and two isomeric 4,5,5,6‐tetramethyl‐2‐oxo‐1,3,2‐dioxathians were prepared and their ^1^H n.m.r. spectra analysed. The values of the vicinal coupling constants reported ea
The complete and unambiguous assignment of the 1H NMR and 13C NMR spectra of 26 N-aralkylsulfonamides, N-sulfonyl-1,2,3,4-tetrahydroisoquinolines and N-sulfonylbenz[c]azepines was performed on the basis of APT, DEPT, homonuclear (gs-COSY) and 1H-detected heteronuclear one-bond (gs-HMQC) and long-ran
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