## Abstract Proton NMR spectra were recorded and analysed for 1‐bromo‐4‐nitrobenzene, 2‐bromo‐5‐nitroluene, 3‐bromo‐6‐nitrotoluene and 2‐bromo‐5‐nitro‐__p__‐xylene, as well as for the corresponding compounds having __p__‐CH~3~C~6~H~4~S in place of Br. Chemical shifts and coupling constants generall
The NMR spectra of some 1,3-oxathians and the influence of heteroatoms on the coupling constants of adjacent protons
✍ Scribed by Y. Allingham; T. A. Crabb; R. F. Newton
- Publisher
- John Wiley and Sons
- Year
- 1971
- Tongue
- English
- Weight
- 390 KB
- Volume
- 3
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
The preparation of 4‐phenyl‐1, 3‐oxathian, 6‐methyl‐1, 3‐oxathian, and some of their 2‐substituted derivatives is described. Significant features of their NMR spectra are discussed with particular reference to the influence of the heteroatoms on the coupling constants of adjacent protons.
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## Abstract The high‐resolution proton‐coupled ^13^C NMR spectra of 2‐chloro‐ and 2‐phenyl‐4‐methyl‐1,3,2‐dithiarsolane and 2‐chloro‐ and 2‐phenyl‐1,3,2‐dithiarsolane have been obtained and completely analysed. The spectral analysis has provided all the ^13^C chemical shifts and ^13^C^1^H coupling
## Abstract The 100 MHz spectrum of 1,3‐oxathiane‐3‐oxide is reported. Parameters obtained from first order analyses are interpreted in terms of an absence of a conformational preference of the SO bond at 38°C, but an axial preference at low temperatures. The behaviour contrasts with that found pr