## 1997 visible and UV spectra visible and UV spectra (organic substances) K 2520 ## 40 -030 UV/Vis Spectroscopic Behavior of Some New Hydroxy Azocoumarin Derivatives. -The UV/visible spectroscopic behavior of the 6 new title compounds (I), available by standard procedures, is investigated. The
Tautomerism and Dimerization of Acetamidothiazole Derivatives − UV/Vis and NMR Spectroscopic Investigation
✍ Scribed by Luciano Forlani; Elisabetta Mezzina; Carla Boga; Marcello Forconi
- Publisher
- John Wiley and Sons
- Year
- 2001
- Tongue
- English
- Weight
- 271 KB
- Volume
- 2001
- Category
- Article
- ISSN
- 1434-193X
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## Abstract NMR spectroscopic studies are undertaken with derivatives of 2‐pyrazinecarboxylic acid. Complete and unambiguous assignment of chemical shifts (^1^H, ^13^C, ^15^N) and coupling constants (^1^H,^1^H; ^13^C,^1^H; ^15^N,^1^H) is achieved by combined application of various 1D and 2D NMR spe
H and I3C NMR data for a synthetic dimeric Lewis X octasaccharide derivative { Gal(/?l-4) [ Fuc(u1-3) 1 GlcNAc(/?l-3)Gal(/?1-4) [ Fuc(a1-3)j GlcNAc(/?1-3)Gal(/31-4)Glc [ /?1-(CH,),CO,C,H, 1 } are reported. Some observations on C,H correlations over two and three bonds, which should prove useful in t