Investigation of aryl oxazolidinones and aryl thiazolidinethiones by NMR spectroscopy
✍ Scribed by Z. Aksaç; A. Altinok; S. İçli
- Book ID
- 103905458
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 303 KB
- Volume
- 39
- Category
- Article
- ISSN
- 1386-1425
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✦ Synopsis
The 'H and 13C resonances of 3-aryl-2-oxazolidinones and 3-aryl-2-thiazolidinethiones have been examined. The conformational isomers of restricted rotation about the aryl C-N bond could not be detected for both of the nuclei. The additive shift parameters, measured for carbon chemical shifts, are found to be higher in the sulphur substituted hetero ring.
📜 SIMILAR VOLUMES
## Abstract ^15^N NMR chemical shifts of 2‐aryl‐1,3,4‐oxadiazoles were assigned on the basis of the ^1^H–^15^N HMBC experiment. Chemical shifts of the nitrogen and carbon atoms in the oxadiazole ring correlate with the Hammett σ‐constants of substituents in the aryl ring (__r__^2^ ≥ 0.966 for N ato
It is thus proved that oxophosphoranesulfenyl chlorides P(0)SCI and esters of tervalent phosphorus acids P-0-R(H) give first the thiol form (3) of the mono-\ < thiopyrophosphate system [31. 2.37 2.37 2.33 2.62 2.64 ## Synthesis of bis(5,5-dimethyt-2-oxo-l,3,2-Pv-dioxaphos-phorinanyI)sulfide ( I ) :