Acetone proton magnetic resonance spectrum

Fig. 2. The proton magnetic resonance spectrum of 5-nitrobenzofuroxan, in acetone at — Sl C. The bands marked by arrows arise from the 5-nitro tautomer.

The boron cation is stable in acidic aqueous solution, somewhat less stable in water, but decomposes in alkaline solution. The proton magnetic resonance spectrum in D20 relative to external TMS shows three bands —8.60 (broad), - —8.19 (doublet, J = 7 Hz.), and —2.85 (singlet), with the expected intensities corresponding to the a- and /6-ring hydrogen atoms and the methyl group, respectively. The bromide is very soluble in cold water and hot ethanol but insoluble in acetone. The hexafluorophosphate is slightly soluble in cold water but very insoluble in acetone. 

Chloro(l,5-cyclooctadiene) (triphenylarsine)platinum(II) tetrafluoroborate is a white, air-stable solid. It is sparingly soluble in polar organic solvents and insoluble in nonpolar ones. A 10-3 M solution in acetone shows a conductivity characteristic of a 1 1 electrolyte.1 Its proton magnetic resonance spectrum (in liquid sulfur dioxide solution, at 60 MHz., with internal tetramethylsilane reference) shows bands due to the coordinated olefin at 3.59 [two protons 55 Hz.], 5.01 [two... 

The white needlelike crystals of tris(l,l,l,5,5,5-hexa-fluoro-2,4-pentanedionato)aluminum are insoluble in water but moderately soluble in carbon tetrachloride, cyclohexane, and benzene. The compound decomposes rapidly in acetone. It melts at 73 to 74° and sublimes at 45° and 0.05 mm. pressure. It has an absorption maximum at 307 mfi its molar extinction coeflicient is 3.23 X 10 1. mol cm. in cyclohexane. The proton magnetic resonance spectrum of the compound in deuterochloroform has a single peak at 6.53 p.p.m. relative to the reference compound, tetramethylsilane. 

Fig. 1.—Proton Magnetic Resonance Spectrum of 5,6-Anhydro-l,2-0-i8opropylidene-a-D-glucofuranose. (A, in neutral acetone B, in acidified acetone. )...

The complexes (l,5-cyclooctadiene)(2,4-pentanedionato)-palladium(II) and platinum(II) tetrafluoroborate are air-stable solids, soluble in polar organic solvents such as chloroform, methylene chloride, acetonitrile, acetone, or methanol but insoluble in nonpolar solvents such as alkanes, benzene, or ether. Their solutions in acetone have conductivities typical of 1 1 electrolytes. Their proton magnetic resonance spectra (in CDC13 solutions, internal tetramethylsilane reference at 60 MHz.) show peaks due to coordinated cyclooctadiene at 3.78 and 6.7-7.4r (Pd) and at 4.25 and 6.9-7.6r (Pt) and due to the chelated /3-diketone at 4.39 and 7.88r (Pd) and at 4.15 and 7.81r (Pt) with the expected area ratios. In the spectrum of the platinum compound coupling with the 95Pt isotope (33 %... 

C -(Dimethylpropylamine)carbaundecaborane(12) is a white crystalline solid, m.p. 191-192°. It is very soluble in acetone and tetrahydrofuran, slightly soluble in chloroform and methanol, and insoluble in benzene and water. The infrared spectrum (Nujol and hexachlorobutadiene mulls) contains major absorption bands at 2988(m), 2561(vs), 1481(m), 1472(m), 1414(m), 1130(m), 1035(m), and 934(m) cm. h The proton nuclear magnetic resonance spectrum (acetone-de solution) exhibits... 

Fig. 8.—The Partial, H Nuclear Magnetic Resonance Spectrum of Sucrose Octaacetate (8) in Solution in Acetone-rid, With a Diagrammatic Representation of the First-order Assignment of the n-Glucose Protons is Shown in A. [The set of INDOR traces (B, C, D, and E) was obtained by sequentially monitoring transitions 1, 8, 5, and 3.]...

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