Saturated Ethanol

If cold saturated ethanolic solutions of the recrystallised tetrahydrocarbazole and of picric acid are mixed and stirred, the chocolate-brown picrate of the carbazole slowly crystallises. After it has been filtered off at the pump, washed with a small quantity of ethanol, and dried, it has m.p. 145-146°. 

Mercuric bromide [7789-47-1 ] M 360.4, m 238.1°. Crystd from hot saturated ethanolic soln, dried and kept at 100° for several hours under vacuum, then sublimed. POISONOUS. 

Estriol Dip the concentrating zone of a precoated H PTLC silica gel 60 plate in a saturated ethanolic solution of Fast Dark Blue R salt, allow the solvent to evaporate, apply the sample solution and dip once [10, 59]... 

To the crude product there was added 100 ml of ethanol with warming until a clear solution was obtained. Then 150 ml ethyl acetate was added and the resultant filtered through a glass mat and the filtrate adjusted to pH 1 by the addition of saturated ethanolic HCI. Crystallization soon occurred. The resultant was allowed to stand at 0°C for 18 hours and then filtered through a sintered glass mat. The solid was dried under vacuum at 60°C for 18 hours yielding 35 g, a 67% yield of 7(S)-chloro-7-deoxylincomycin hydrochloride as an ethanol solvate. 

As discussed earlier by Senthilnathan and Hurtubise (4), before a saturated ethanol solution of sodium acetate is formed, the solid-surface RTF is less than the RTF from samples prepared with solutions that are saturated with sodium acetate. It was shown by Ramasamy and Hurtubise (12) that both the RTF and RTF quantum yields of the p-aminobenzoic acid anion increased as the amount of sodium acetate increased in the solid mixtures. Figure 4 shows the quantum yield of fluorescence and the quantum yield of phosphorescence )... 

Nitroimidazoles substituted by an aromatic ring at the 2-position are also active as antitrichomonal agents. Reaction of p-fluorobenzonitrile (83) with saturated ethanolic hydrogen chloride affords imino-ether 84. Condensation of that intermediate with the dimethyl acetal from 2-aminoacetaldehyde gives the imidazole 85. Nitration of that heterocycle with nitric acid in acetic anhydride gives 86. Alkylation with ethylene chlorohydrin, presumably under neutral conditions, completes the synthesis of the anti-... 

Fig. 32. UV-vis spectra of a 5% PdAhO catalyst determined with the equipment depicted in Fig. 31. The reference was recorded at time t = 0 during the flow of hydrogen-saturated ethanol. The three bottom spectra were recorded during the flow of hydrogen-saturated ethanol at t = 1, 15, and 30 min. The three top spectra were recorded during the flow of oxygen-saturated ethanol at t = 40, 49, and 66 min. The inset shows the absorbance at 330 nm as a function of time. The spectra represent averages of 200 scans with 100 ms accumulation time each. The flow rate was 0.3mL/min (96).

X-ray Crystallographic Analysis of Divinorin A (1). Crystals of divinorin A were obtained by slow cooling of a saturated ethanolic solution. A crystal of dimensions 0.078 x 0.269 x 0.418 mm was mounted on a Syntex 02, diffractomenter and found to have the space group 7 2i2i2i with a = 6.369 (2) Kji =... 

These results suggest that the concentration of cyanide ions must be very low, even less than the solubility of NaCN in anhydrous ethanol (0.1%). In fact by saturating ethanol with NaCN at 50°C and then adding the catalyst, the reaction occurred to a limited extent. Analogous conclusions can be drawn from the results of reactions carried out with acetone cyanohydrin (Table IV). 

Picrates are usually prepared by adding a hot solution of the compound in ethanol to a cold saturated ethanolic solution of picric acid, warming and allowing to cool the derivative separates in a crystalline condition. It is filtered off, washed with a little ether and pressed on a porous tile. If the picrate is stable, it is recrystallised from ethanol, ethyl acetate, benzene or ether. Do not mistake the recrystallised reagent (m.p. 122 °C) for a picrate. 

Add 0.1 g of the aldehyde in 5 ml of 50 per cent ethanol to 2 ml of a 10 per cent or saturated ethanolic solution of dimedone. If a precipitate does not form immediately, warm for 5 minutes if the solution is still clear at the end of this period, add hot water until the mixture is just cloudy and cool to about 5 °C. Collect the crystalline derivative and recrystallise it from methanol-water or ethanol-water. 

The latter was dissolved in 100 ml of absolute ethanol, the mixture acidified with 400 ml of saturated ethanolic hydrogen chloride, and a stream of hydrogen chloride gas was passed through the mixture causing the temperature to rise to 80°C. The solid which separated from the reaction mixture was collected after standing overnight, and washed with cold absolute ethanol to give 38 g of crude 2-carboxy-5,6 -dimethoxy-3-(2-hydroxyethyl) indole. 

The stain is 30 ml saturated ethanolic solution of methylene blue mixed with 100 ml 0.01% aqueous KOH. 

Triphenyl Telluronium Tribromomercurate (H)6 Saturated ethanolic (or aqueous) solutions of triphenyl telluronium bromide and mercury(II) bromide are mixed, the mixture is filtered, and the solid is recrystallized from acetone m.p. 144°... 

When saturated ethanol (X = Cl, Br) or methanol solutions (X = 1) of triphenyl telluronium halides (2 mol) and mercury (II) halides (1 mol) were combined, precipitates analyzing for bis[triphenyl telluronium] tetrahalomercurate(II) were formed6. 

The possibility of ethanol-induced alterations in the protein domains of SC was considered by Kurihara-Bergstrom et al. [124], who examined human SC treated with perdeuterated ethanol-water systems by FT-IR. The penetration studies showed that the maximal permeability coefficient for salicylic acid and ethanol from saturated ethanol-water delivery systems was achieved at 0.63 volume fraction of ethanol. Infrared spectra of SC samples immersed in EtOD-D20 systems for 6 hours revealed the presence of keratin, predominantly in the a-helical conformation, up to 0.25 volume fraction EtOD. Above this concentration, the appearance of shoulders at 1688 and 1615 cm near the Amide I band at 1650 cm was interpreted as the formation of extended chains or distorted P-strands within the protein domain. An evaluation of lipid extraction was also made by comparing the intensities of the infrared bands arising primarily from stratum comeum proteins to those associated with lipid domains. A decreased absorbance of the C-H stretching bands relative to the N-H stretching band would indicate that some degree of lipid extraction had occurred. The ratio of these two bands decreased from 0.96 to 0.76 as volume fraction ethanol increased from 0.4 to 1.00, respectively, indicating lipid extraction. 

Pentacarbonyl-tri-/i-chloro-nitrosyldirhenium (1.1 g 1.7 mmoles) is dissolved in 600 ml of benzene under nitrogen. A saturated ethanolic hydrogen... 

An alternate route to porphocyanines predicated on the use of Schiff base chemistry has also been reported. Using this latter, simplified approach, porphocyanine 9.110 could be prepared directly from diformyl dipyrrylmethane 9.120 by treating with ammonia-saturated ethanol followed by oxidation with oxygen (Scheme 9.2.5). In a similar way, the ieiraA w(ethoxycarbonyl)-derived porphocyanine 9.122 was also prepared. As might be expected, this highly functionalized system could not be obtained using the initial synthetic pathway. 

One chemical test that is useful for textile wet processes may be the spot test. By using hydroxamic acid, waxes and fatty oils can be distinguished from their mineral counterparts." In a small crucible, one drop of a saturated ethanol solution of hydroxamic acid is mixed with one drop of an ethanol solution of the sample and one drop of an ethanol solution of KOH. The mixture is heated to bubbling (evaporation) and then allowed to cool and is acidified with HCl. A drop of FeCl, is added to the acidified sample. A violet colour confirms the existence of waxes and fatty oils. Carboxylates may also give a positive result. If the saponification number of waxes needs to be known, ASTM D1387 can be used. ASTM D1386 can be used to determine the acid number of waxes. ... 

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