Nuclear magnetic resonance spectra sodium

The nuclear magnetic resonance spectrum of sodium valproate as shown in Figure 3 was obtained on a Varian Associates T-60 NMR Spectrometer in deuterium oxide containing tetramethylsilane as the internal standard. The spectral peak assignments (2) are presented in Table I. 

FIGURE 3 - NUCLEAR MAGNETIC RESONANCE SPECTRUM OF SODIUM VALPROATE... 

Nuclear Magnetic Resonance Spectrum The NMR spectrum of sodium secobarbital... 

Fig. 2. Nuclear magnetic resonance spectrum of sodium secobarbital instrument Varian A-60...

Attempts to prepare esterified glycals by the reduction of glycofuranosly halides with zinc in acetic acid failed, because of the reactivity of this class of compound (see p. 92). When, however, 3,5-di-0-benzoyl-2-0-(p-nitrophenylsulfonyl)-/3-D-ribofuranosyl bromide (8) in acetone is treated at 5° with sodium iodide, a facile elimination takes place and 3,5-di-O-benzoyl-1,2-dideoxy-D-er2/i/iro-pent-l-enofuranose (9) is obtained crystalline, in 72% yield. The product was characterized by identifying its hydrogenation product as the known l,4-anhydro-3,5-di-0-benzoyl-2-deoxy-D-er2/nuclear magnetic resonance spectrum, which showed clearly that the glycal structure was present. 

The structure of P-O-P-acid is proved by its preparative reactions, the empirical formulas of its sodium salt, and its reactions with acids, alkalies, and oxidizing agents. A nuclear magnetic resonance spectrum... 

FIGURE 2. Nuclear Magnetic Resonance Spectrum in DMSO-d of Dioctyl Sodium Sulfosuccinate... 

Bumamicine. This natural constituent isolated in trace quantities from Hmteria eburnea is included here because of its obvious relationship to corynantheol and because it represents a good example of the use of mass spectrometry in structure deduction. Bumamicine had an ultraviolet absorption maximum typical of a 2-acylindole which changed to that of a typical indole upon either sodium borohydride reduction or solution in acid. After the latter experiment the original chromophore was regenerated in basic solution. From the nuclear magnetic resonance spectrum the four aromatic protons, the ethylidene and the N-methyl were identifiable. The recovered alkaloid upon acetylation had an ultraviolet and nuclear magnetic resonance spectrum consistent for an ind N,0-diacetate (probably primary). 

Table 3. Proton nuclear magnetic resonance assignments for spectrum of sodium valproate...

Fig. 12.3. The phosphorus composition of broiler litter from a farm in Delaware, USA, determined by extraction with a solution containing sodium hydroxide and ethylenediaminetetraacetate (EDTA) and solution nuclear magnetic resonance spectroscopy. The extract contained 97% of the total phosphorus in the litter, of which 40% was phosphate and 60% was myo-inositol hexakisphosphate (phytic acid). Traces of pyrophosphate were also detected. The inset spectrum shows the four signals from myo-inositol hexakisphosphate, corresponding to the positions of the phosphates on the inositol ring (C-1 to C-6). Details of analytical methodology can be found in Turner (2004).

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