Solids melting points

Lee-Thodos presented a generahzed treatment of self-diffusivity for gases (and liquids). These correlations have been tested for more than 500 data points each. The average deviation of the first is 0.51 percent, and that of the second is 17.2 percent. 8 = PyVr, s/cm and where G = (X - X)/(X - 1), X = p,/T h and X = p /T evaluated at the solid melting point. 

Ethyl S-lp-chlorobenzoyl)-1,4-dimethylpyrrole-2-acetate A 9.0 g (0.0255 mol) sample of ethyl 5-(pwhite solid, melting point 107°C to 109°C. 

Low-density polyethylene exists as a partially crystalline solid, Melting point 115°C. Its density has been found to range between 0.91-0.94. It is practically insoluble in any solvent at room temperature but is soluble in many solvents at temperature above 100°C. Some of the useful solvents for it are CC14. 

DCC is an inexpensive brittle solid, melting point 34-35°C, that must be crushed or warmed to a viscous liquid to withdraw it from a container. It generates a very bulky A. V -dialkylurca that is insoluble in organic solvents, and, hence, it may interfere with mixing. Filtration removes most of the urea, but it is soluble enough in the usual solvents that its complete removal can be problematic. It is least soluble in water, hexane, or acetone cooling a solution of a product in acetone for a few... 

SBA is a colorless, high boiling point (212°F) liquid with a pleasant odor. TBA, on the other hand, is a white solid (melting point is 78°F) with a camphor-like odor. Both alcohols are traded as technical grade (99% purity) and need a hazardous (corrosive) materials label. 

Tellurium tetrachloride is a pale yellow crystalline solid, melting point (m.p.) 225°C, highly hygroscopic, soluble in dioxane, acetone, ether, methanol and ethanol but less soluble in benzene and chloroform. 

ANTHRACENE. [CAS 120-12-71. A colorless solid melting point 218c,C, blue fluorescence when pure insoluble in water, slightly soluble in alcohol or ether, soluble in hot benzene, slightly soluble in cold benzene transformed by sunlight into para-anthracene (C HioL. 

SALICYLIC ACID AND RELATED COMPOUNDS. [CAS 69-72-7], Salicylic acid or C H4(OH)(COOH) is a white solid, melting points 159°C, sublimes at 76°C, insoluble in cold water, soluble in hot water, alcohol, or ether. With ferric chloride solution, salicylic acid solutions are colored violet (distinction from benzoic acid). 

Properties. The DPXs are all ciystalline solids melting points and densities arc given in Tabic I. Their solubility in aromatic hydrocarbons is limited. 

Properties. The DPXs are all crystalline solids melting points and densities are given in Table 1. Their solubility in aromatic hydrocarbons is limited. At 140°C, the solubility of DPXN in xylene is only about 10%. DPXC is more readily soluble in chlorinated solvents, eg, in methylene chloride at 25°C its solubility is 10%. In contrast, the corresponding figure for DPXN is 1.5%. 

All compounds are crystalline, colorless to pale yellow solids melting point range, 237 299°C fluorescent to UV light.1 3... 

Solvent removal and purification of the residue by chromatography (hexane-EtOAc, 8 2) gave 1.25 g (100%) of menthyl (lS,2S,3S)-2-hydroxymethyl-3-methylcyclopropane-l-carboxylate as a white solid, melting point 85°-86°C. 

A solution of triphenylphosphine (1.42 g, 5.41 mmol) in CH2CI2 (15 ml) was cooled to 0°C and treated with CBr4 (0.896 g, 2.70 mmol). A solution of menthyl (lS,2S,3S)-2-formyl-3-methylcyclopropane-l-carboxylate (0.360 g, 1.35 mmol) in CH2CI2 (10 ml) was then added dropwise. The yellow solution was stirred at 0°C for 30 min. The solvent was evaporated in vacuum, and the residue was chromatographed over silica gel (hexane-EtOAc, 96 4) to give 0.56 g (98%) of menthyl (lS,2S,3S)-2-(2,2-dibromovinyl)-3-methylcyclopropane-l-carboxylate as a white solid, melting point 75°-76°C. 

A solution of 529.8 g (3.505 mole) methyl anthranilate and 294.4 g 50 weight percent NaOH (3.68 mole) in 3.6 L CH2CI2 and 1.8 L water was stirred in an ice-bath as 627.8 g (3.680 mole) p-anisoyl chloride was added at such rate that the temperature did not exceed 10°C (time required was 1.25 hr). The mixture was allowed to warm to 23°C. Acetic acid (50 mL) was added to adjust the pH to 5. The layers were separated and the organic layer was washed with 10% aqueous NaHC03 (1 times 0.8 L) and brine (1 times 0.8 L). The residual white solid was recrystallized from 7.0 L boiling material. The product was dried in vacuo at 70°C for 24 hr to yield 959.7 g (96.0%) white crystalline solid, melting point 122.5°C-124.5°C. 

In this process, 20 g of methyl ll-oxo-6,ll-dihydrodibenz[b,e]oxepin-2-acetate is dissolved in 500 ml of tetrahydrofuran. To the solution is added 6.0 g of lithium aluminum hydride and the mixture is stirred at room temperature for one hour. After decomposing an excess of the reagent by the addition of water to the solution, the mixture is filtered to remove an inorganic salts and the filtrate is concentrated to dryness under reduced pressure to obtain 17.7 g of the desired product as a white solid. Melting point 132°-136°C. 

A cold, stirred solution of 1-phenyl-piperazine in tetrahydrofuran was treated all at once with [3-(2-methyl-5,6-dimethoxy)indolyl]glyoxalyl chloride. There was an immediate voluminous precipitate of a white crystalline solid which was removed by filtration. The filtrate was taken to dryness and the residual light brown gum was stirred and shaken with water, ethyl acetate and acetic acid. The mixture was warmed on a steam bath and the resulting solid was collected after cooling in an ice bath thus affording l-[(3-(2-methyl-5,6-dimethoxy)indolyl)glyoxalyl]-4-phenylpiperazine as a near white solid, melting point 163°-174°C. 

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