The 13C-n.m.r. signals of the heptitols in aqueous solution, and of their acetates in chloroform solution, have been assigned by the use of specifically deuterium-substituted compounds. From these spectra, the preponderant conformation of each heptitol has been determined, particularly by comparison
14N-N.M.R. study of the association between paramagnetic and diamagnetic ions in solution
✍ Scribed by P.K. Burkert; H.P. Fritz; W. Gretner; H.J. Keller; K.E. Schwarzhans
- Publisher
- Elsevier Science
- Year
- 1968
- Weight
- 132 KB
- Volume
- 4
- Category
- Article
- ISSN
- 0020-1650
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
Amylose (average d.p. 1000) and amylodextrin (average d.p. 25) have identical 13C-n.m.r. spectra, except for some minor signals from the small amount of (u-1+6 branch linkages present in amylodextrin. Amylodextrin can be obtained as stable solutions in much higher concentrations than amylose and so
## Abstract Total bandshape analysis of the temperature‐dependent n.m.r. spectrum of the bridge methylene protons in 6,6‐dicarbethoxy‐1,2,3,4‐dibenzcyclohepta‐1,3‐diene has been carried out to yield the following activation parameters: Δ__G__ = 60.96 ± 0.17 kJmol^−1^ (14.57 ± 0.04 kcal mol^−1^), ΔH
The stability constant of the EDA complex between N,Ar,N',N'-tetramethyl-p-phenylendiamine and m-dinitrobenzene in acetonitrile has been studied by cyclic voltammetry and potentiometric titration at constant finite current. For comparison, spectral measurements were made. The spectroscopic technique
N.m.r. spectroscopic studies (iH, 13C) have shown that hydroxylamine and hydrazine react with 2,3-O-isopropylidene-D-ribofuranose (1) and D-ribose (2) to give primarily the acyclic oxime and hydrazone, respectively, whereas thiosemicarbazide affords mainly the cyclic pyranosyl and furanosyl derivat