Carbon disulfide, solvent

Likewise, you can accomplish monobromination by running the reaction at extremely low temperatures in carbon disulfide solvent. 

Alternatively, direct electrophilic acylation of a BIPS also occurred in the 3-position. Vilsmeier formylation of 6-nitroBIPS gave 22% of the 3-formyl derivative (113, R=H) acetic anhydride with boron trifluoride etherate in chloroform solvent gave 56% of the 3-acetyl compound (113, R=Me) and benzoyl chloride with aluminium bromide in carbon disulfide solvent gave 26% of 3-benzoyl-6-nitroBIPS (113, R=Ph). None of the 3-acyl BIPS showed any coloration upon UV irradiation in any solvent.106... 

Summary Ammonium picramate is the ammonium salt of picramic acid, and is made by reducing picric acid with ammonium bisulfide and ammonia solution. Sulfur is a by-product and must be removed with carbon disulfide. The sulfur/carbon disulfide solution can be distilled to recover the carbon disulfide solvent, and recover the sulfur by-product. The ammonium picramate is recovered by filtration. Commercial Industrial note Part or parts of this laboratory process may be protected by international, and/or commercial/industrial processes. Before using this process to legally manufacture the mentioned explosive, with intent to sell, consult any protected commercial or industrial processes related to, similar to, or additional to, the process discussed in this procedure. This process may be used to legally prepare the mentioned explosive for laboratory, educational, or research purposes. 

As mentioned in Chap. 4, Khulbe et al. studied dense poly(phenylene oxide) membranes cast from solutions of different solvents by AEM [40]. PPO-CS2 represents PPO membrane cast from PPO solution in carbon disulfide solvent, while PPO-TCE represents PPO membrane cast from PPO solution in trichloroethylene solvent. 

PPG-3 methyl ether Tetraethylene glycol ethyl. ether Triglycol monomethyl ether solvent, bromine Carbon disulfide solvent, bromo acid dye lipstick PEG-10 lanolate PEG-20 lanolate solvent, bromo acid dye make up PEG-10 lanolate PEG-20 lanolate solvent, bromo acid dye skin care PEG-10 lanolate PEG-20 lanolate solvent, bromo dye Laneth-5... 

Takahashi Y, Takada Y, Kotake S, Matsumuro A and Senoo M, Phototransformed Ceo powder and film synthesised in toluene, benzene and carbon disulfide solvents , J Ceram Soc Japan, 1997 105(6) 544-547. 

Halogenation of 2-aminothiazole and derivatives has been reported under a wide variety of experimental conditions in water (161, 405. 406) in aqueous acids (16. 172, 407, 408) in solvents such as chloroform (27. 172), carbon disulfide (162, 166. 320. 409). benzene (165), acetic acid (410-413, 1580). or hydrochloric acid (414) or in 20% sulfuric acid (415-417). 

Reactions were carried out by condensing a-aminonitriles [NCCHiRiiNHJ with carbon disulfide in the presence of aldehydes (R CHO) or ketones [Pg.287]

Methyiaminoacetonitrile (216) reacts with carbon disulfide in the presence of acetic anhydride with ethyl acetate as solvent to give 2-thio-3-methyl-A-4-thiazoline in 74% yield (Scheme 113a) (326). If the reaction is carried out using benzaldehyde in place of acetic anhydride, the corresponding 5-benzylideneamino derivative of 217 is obtained in 70% yield. 

When a dilute solution of 6 phenylhexanoyl chloride in carbon disulfide was slowly added (over a period of eight days ) to a suspension of aluminum chloride in the same solvent it yielded a product A (C12H14O) in 67% yield Oxidation of A gave benzene 1 2 dicarboxyhc acid... 

Acetyl chlotide reacts with aromatic hydrocarbons and olefins in suitably inert solvents, such as carbon disulfide or petroleum ether, to furnish ketones (16). These reactions ate catalyzed by anhydrous aluminum chlotide and by other inorganic chlotides (17). The order of catalytic activity increases in the order... 

DMAC and nonpolar solvents form synergistic mixtures which dissolve high molecular weight vinyl chloride homopolymers. For example, a mixture of DMAC with an equal volume of carbon disulfide [75-15-0] a nonsolvent, dissolves 14 wt % of Geon 101 vinyl chloride homopolymer at room temperature, whereas the solubUity of Geon 101 ia DMAC alone is about 5 wt % (15). 

Carbon disulfide as solvent favors the formation of the acid siace the iatermediate complex formed, C H COCl AlCl, is iasoluble ia it and by precipitation avoids secondary ketone formation. 

Naphthalene is very slightly soluble in water but is appreciably soluble in many organic solvents, eg, 1,2,3,4-tetrahydronaphthalene, phenols, ethers, carbon disulfide, chloroform, ben2ene, coal-tar naphtha, carbon tetrachloride, acetone, and decahydronaphthalene. Selected solubiUty data are presented in Table 4. 

Dinitrotoluene crystallizes in yellow needles from carbon disulfide and is soluble in a number of organic solvents. It is only slightly soluble in water, 0.03 g/100 g of water at 22°C. Its physical properties are Hsted in Table 13. 

The solubiHty of phosphoms in water is about 3 ppm. However, process water used in phosphoms manufacture or handling often catties larger amounts of phosphoms as particulates or small droplets, depending on the water temperature. Phosphoms-contaminated water is commonly called phossy water. Phosphoms has low solubiHty in most common solvents, but is quite soluble in carbon disulfide and some other special solvents. The solubiHty in CS2 and benzene was formerly used in phosphoms analyses, but toxicity and increasing waste disposal costs have led to mote use of toluene and xylene, and mote tecentiy to the use of nonchemical turbidity measurements. 

Chemical Properties The formation of salts with acids is the most characteristic reaction of amines. Since the amines are soluble in organic solvents and the salts are usually not soluble, acidic products can be conveniendy separated by the reaction with an amine, the unshared electron pair on the amine nitrogen acting as proton acceptor. Amines are good nucleophiles reactions of amines at the nitrogen atom have as a first step the formation of a bond with the unshared electron pair of nitrogen, eg, reactions with acid anhydrides, haUdes, and esters, with carbon dioxide or carbon disulfide, and with isocyanic or isothiocyanic acid derivatives. 

Cellulose Solvent. Although DMSO by itself does not dissolve cellulose, the following binary and ternary systems are cellulose solvents DMSO—methylamine, DMSO—sulfur trioxide, DMSO—carbon disulfide—amine, DMSO— ammonia—sodamide, DMSO—dinitrogen tetroxide,... 

Upon solidification of molten sulfur, Stt rapidly changes into S]l, which is converted into SL, although at a much slower rate. The molecular stmcture of Stt is that of an octatomic sulfur chain (1,2). The symbol S]1 designates long, polymerized chains of elemental sulfur. SX is perhaps the most characteristic molecular form of sulfur, namely, that of a crown-shaped, octatomic sulfur ring designated in more recent Hterature as (3). The allotropes have different solubiUty in carbon disulfide. Stt and SX are soluble in carbon disulfide, whereas S]1 does not dissolve in this solvent. 

Sulfur is insoluble in water but soluble to varying degrees in many organic solvents, such as carbon disulfide, ben2ene, warm aniline, warm carbon tetrachloride, andUquid ammonia (18). Carbon disulfide is the most commonly used solvent for sulfur. 

Diethanolamine (DEA) has replaced MEA as the most widely used amine solvent. High load DEA technologies, such as that developed by Elf Aquitaine, permit the use of high (up to 40 wt % DEA) concentration solutions. The Elf Aquitaine—DEA process allows lower cinculation rates, and has consequent reductions ia capital and utility expenses. DEA tends to be more resistant to degradation by carbonyl sulfide and carbon disulfide than MEA. DEA is, however, susceptible to degradation by carbon dioxide. 

The heavy metal salts, ia contrast to the alkah metal salts, have lower melting points and are more soluble ia organic solvents, eg, methylene chloride, chloroform, tetrahydrofiiran, and benzene. They are slightly soluble ia water, alcohol, ahphatic hydrocarbons, and ethyl ether (18). Their thermal decompositions have been extensively studied by dta and tga (thermal gravimetric analysis) methods. They decompose to the metal sulfides and gaseous products, which are primarily carbonyl sulfide and carbon disulfide ia varying ratios. In some cases, the dialkyl xanthate forms. Solvent extraction studies of a large number of elements as their xanthate salts have been reported (19). 

Reactions. The chemistry of the xanthates is essentially that of the dithio acids. The free xanthic acids readily decompose in polar solvents, the rate being 10 times greater in methanol than in hexane. The acids decompose at room temperature to carbon disulfide and the corresponding alcohol the resulting alcohol autocatalyticaHy faciUtates the decomposition. 

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