Methyl, alcohol benzene

Tellurium dipropionylmethane (2 6-Dimethylcyclotelluro-pentanedione) (Formula II), obtained from the dichloride by bisulphite reduction, crystallises from methyl alcohol, benzene or aqueous ethyl alcohol as well-defined golden-yellow needles, M.pt. 151° C. with slight decomposition. Under diminished pressure it sublimes at 110° C. as slender needles, which slowly pass at this temperature into compact prisms. It readily dissolves in organic solvents, except light petroleum in water it is sparingly soluble, the solution giving no enolic reactions. 

Toxic solvents, such as methyl alcohol, benzene, and chlorinated hydrocarbons, can penetrate the skin through cuts and abrasions. On contact, these solvents cause chronic dermatitis and allergic skin reactions in susceptible individuals. 

Munster, N., C. A. Plank, W. L. S. Laukhuf, and P. M. Christopher. 1984. Vapor-liquid equilibria of the ternary system methyl borate-methyl alcohol-benzene. 

Methyl Alcohol Benzene Isobutyl Nitrite Chloroform... 

Tetrahydrocarbazole (2.00 g, 11.68 mmol), chloranil (5.77 g, 23.68 mmol), and the minimum volume of boiling, sulfur-free xylene required to form a clear solution were refluxed until a few drops of the solution gave no red color when heated with sodium hydroxide (24 h). The solution was then cooled, separated from tetrachloroquinol, diluted with ether, shaken first with sodium hydroxide and then with water, and finally dried (sodium sulfate). On evaporation of the solvents, the impure crystalline compound separated and was purified by crystallization from methyl alcohol, benzene, or xylene when this method failed, purification was effected by chromatographic adsorption. 

FIGURE 3.13 Composite adsorption isotherms on various sugar charcoal samples from methyl alcohol-benzene mixtures. (Curves A, C, D, and E represent original sugar charcoal and charcoal samples degassed at 400, 1100, and 750°C, respectively.) (After Puri, B.R., Kumar, S., and Sandle, N.K., Indian J. Chem., 1, 418, 1963.)... 

Acetone acetonitrile ethyl alcohol Isopropyl alcohol methyl alcohol benzene carbon tetrachloride cyclohexane chloroform N-dimelhylform amide dimethyl solfoxide n-hexane diethyl ether diethyl acetate dlchloromethane pyridine tetrahydrofuran toluene... 

Polyvinylidene Chloride (PVDC) Resorcinol/Methyl Alcohol/Benzene/Water... 

The acetamide often contains a minute amount of impurity having an odour resembling mice excrement this can be removed by washing with a small volume of a 10 per cent, solution of ethyl alcohol in ether or by recrystallLsation. Dissolve 5 g. of impure acetamide in a mixture of 5 ml. of benzene and 1 5 ml. of dry ethyl acetate warm on a water bath until all is dissolved and cool rapidly in ice or cold water. Filter oflF the crystals, press between Alter paper and dry in a desiccator. The unpleasant odour is absent and the pure acetamide melts at 81°. Beautiful large crystals may be obtained by dissolving the acetamide (5 g.) in warm methyl alcohol (4 ml.), adding ether (40 ml.) and allowing to stand. 

The aluminium amalgam is prepared as described in Section 11,50,72. After washing with water, it slioidd lir.st be washed with methyl alcohol and Anally with a little dry benzene. 

Section IV,49). Reflux the mixture for 1 hour and allow to cool, with continuous stirring. Distil off the methyl alcohol. Add hot water to the residue, filter from impurities, extract the antipyrine with benzene, and evaporate the solvent. RecrystaUise the crude product from benzene or benzene - hght petroleum or from hot water wdth the addition of a little decolomising carbon. The yield of antipyrin (white crystalline solid, m.p. 113°) is 3o g. 

Bebeerine, CjjHjgOjNj. This alkaloid has been described imder various names, pelosine, chondrodendrine, chondodendrine and curine (Z-form) whose origin is described elsewhere (pp. 363 and 374). It crystallises with one molecule of benzene, m.p. 161°, or 213° (solvent-free) or from methyl alcohol, m.p. 214°, and has [ajn 298° (EtOH) for the d- or Z-form (Scholtz ). Spath et recorded m.p. 221-221-5° (vac.) for both forms and + 332° and — 328° for the d- and Z-forms, in pyridine. 

After drying, the residue is treated in a Kumagawa extracting apparatus with boiling benzene. The benzene is evaporated and the residue is distilled in vacuo. About 50 g of cyanonerolin (BP = 205° to 208°C/14 mm) are obtained with a yield of about 70%. By recrystallization in 200 cc of methyl alcohol, 40 g of the product are obtained in absolutely pure state, in the shape of beautiful colorless needles (MP = 103°C with the Maquene block). By concentrating the mother liquor to half its original volume, a further 3.6 g of pure product are obtained. 

Tetrahydrofuran (THF) impurities acetone, acrolein, 2,3-DHF, butyraldehyde, isopropyl alcohol, THF. 1,3-dioxolane, 2-methyl THF, benzene, and 3-methyl THF... 

The apparatus consists of a 3-]. three-necked flask fitted with a mercury-sealed mechanical stirrer, a reflux condenser, a dropping funnel, and a thermometer which reaches almost to the bottom of the flask. Five hundred grams of potassium hydroxide pellets (85 per cent potassium hydroxide) (7.5 moles) and 750 cc. of commercial absolute methyl alcohol (free from acetone) are placed in the flask and stirring begun. The bulk of the alkali dissolves in a few minutes, with the evolution of heat. The flask is now surrounded by an ample cold-water bath, and, when the internal temperature drops to 6o°, addition of a mixture of 360 g. (353 cc., 3 moles) of -tolualdehyde (Note 1), 300 cc. of formalin (3.9 moles) (Note 2), and 300 cc. of absolute methyl alcohol is begun at such a rate that the internal temperature remains at 60-70°. This addition requires about fifteen minutes. The internal temperature is then maintained at 60-70° for three hours, after which the reflux condenser is replaced by a downward condenser, and the methyl alcohol distilled with the aid of a brine bath until the internal temperature reaches ioi°. Nine hundred cubic centimeters of cold water is then added to the warm residue, and the mixture cooled. The resulting two layers are separated at once (Note 3), and the aqueous layer extracted with three 200-cc. portions of benzene. The combined oil and extracts are washed with five or six 50-cc. portions of water (Note 4), and the combined washings extracted... 

Durene, pentamethyl benzene and hexamethyl benzene have usually been prepared from benzene or one of its methylated derivatives by the Friedel-Crafts synthesis.1 Durene has been made from bromine derivatives of methylated benzenes by the Fittig reaction.2 It has also been obtained in 20 per cent yield by passing methyl alcohol and acetone vapors over heated alu-... 

Valproic acid is slightly soluble in water. It is freely soluble in acetone, alcohol, chloroform, ether, benzene, n-heptane, methyl alcohol, and 0.1 N sodium hydroxide slightly soluble in 0.1 N hydrochloric acid [2,3],... 

Hydrolysis of the condensate gives LXIII and this by the agency of methyl alcoholic alkali affords the enol form of 2-desoxy-L-ascorbic acid (LXIV). 1 When the latter is allowed to react with benzene diazonium chloride there is formed the mono(phenylhydrazone) LXV from which... 

Reaction of methyl iodide with pyridine in alcohol-benzene mixtures.467 70... 

Photolysis of DMDAF in benzene containing methyl alcohol gives the ether expected from the reaction of the singlet carbene. Monitoring this reaction by laser spectroscopy reveals that the detected transient reacts with the alcohol with a bimolecular rate constant very near the diffusion limits. In contrast, the transient reacts with triethylamine at least 100 times more slowly than it does with alcohol (Table 7). This behavior is inconsistent with identification of the transient as the cation or radical and points to its assignment as the singlet carbene. 

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