## Abstract The charge separation between the dithiole ring and oxygen in 3‐(1′,2′‐dithiole‐3′‐ylidene)‐6‐methyl‐2,3‐dihydropyran‐2,4‐diones and 3‐(1′,2′‐dithiole‐3′‐ylidene)‐2,3‐dihydrobenzo[__b__] pyran‐2,4‐diones has been determined by ^13^C and ^19^F n.m.r. spectroscopy. By both methods it is f
Furanose ring anomerization: kinetic and thermodynamic studies of the d-2-pentuloses by 13C-n.m.r. spectroscopy
✍ Scribed by Jian Wu; Anthony S. Serianni; Tapani Vuorinen
- Book ID
- 107725940
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 820 KB
- Volume
- 206
- Category
- Article
- ISSN
- 0008-6215
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## Abstract The 1‐NH structure for 3‐azidoindazole has been demonstrated by the observation of ^1^H^1^H and ^13^C^1^H couplings involving the hydrogen atom attached to nitrogen. A comparison between 3‐azidoindazole and indazole shows that both compounds have the same tautomeric structure.
13C-N m.r. . spectroscopy has been used to determine the equilibrium composition of solutions of maltulose and isomaltulose in deuterium oxide. Resonance assignments have been made for maltulose, isomaltulose, sucrose, leucrose, I-kestose, nystose, inulin, and grass levan. Some earlier assignments