Ethane 1,1,1,2-tetrachloro

Bromoform, chloroform, bromodichloro-methane, dibromo-chloro methane Tetrachlorom ethane, chloroform, dichloro-ethane, tetrachloro-ethylene, bromodi-chloro methane, chlorodibromo-methane, bromoform Hexachlorocyclo-pentadiene... 

For an actual determination, first place in J some stable liquid the boiling-point of which is at least 50 above that of the organic liquid the pour density of which is to be measured. This difference in boiling-point is important, because it is essential that the organic liquid, when nbsequently dropped into the bottom of T, should volatilise rapidly nd so push out an equivalent volume of air before the organic vapour can diffuse up the tube T and possibly condense in the cooler ttppcr portion of the tube. Suitable liquids for use in the jacket are ter, chlorobenzene (132°), rym-tetrachloro-ethane (147 ), P ... 

Bromocyclopropane has been prepared by the Hunsdiecker reaction by adding silver cyclopropanecarboxylate to bromine in dichlorodifluoromethane at —29° (53% yield) or in tetrachloro-ethane at —20° to —25° (15-20% yield).3 Decomposition of the peroxide of cyclopropanecarboxylic acid in the presence of carbon tetrabromide gave bromocyclopropane in 43% yield.4 An attempt to prepare the bromide via the von Braun reaction was unsuccessful.3... 

Note Viscosity measurement 30°C, 0.4 g/dL in 60/40 phenol-tetrachloro-ethane. 

Inherent viscosity measured at 0.1% concentration in 90% phenol/10% tetrachloro ethane solvent. 

Tin(IV) chloride Tin chloride (8) Stannane, tetrachloro- (9) (7646-78-8) Bromotris[3-(2-methoxyethoxy)propyl]stannane 2,5,13,16-Tetraoxa-9-stannaheptadecane, 9-bromo-9-[3-(2-methoxyethoxy)propyl]- (12) (130691-02-0) Dimethoxyethane Ethane, 1,2-dimethoxy- (8,9) (110-71-4)... 

CASRN 630-20-6 molecular formula C2H2CI4 FW 167.85 Chemical/Physical. The experimentally determined hydrolysis half-life of 1,1,1,2-tetrachloro-ethane in water at 25 °C and pH 7 is 46.8 yr (Jeffers et al, 1989). 

Acetylcyclopentane-l,3-dione has been obtained in small amounts from the aluminum chloride-catalyzed reactions of vinyl acetate and succinyl chloride in 1,1,2,2-tetrachloro-ethane. 2-Acetylcyclopentane-l,3-diones have been prepared via Dieckmann condensation of 1,4-bisethoxycarbonylhexane-3,5-diones. The present procedure is essentially that of Mer nyi and Nilsson with some modifications. 

Freon—BF , Solvent or Tetrachlorodifluoro-ethane. See l,2-Difluoro-I,l,2,2-tetrachloro-ethane in this Section... 

Miller passed fluorine over liquid chloroform, pentachloroethane, 1,1,2,2-tetrachloro-ethane, tetrachloroethene, and trichloroethene. He was able to control the reactions, though mixtures of products resulted. Replacements of hydrogen and of chlorine, additions to C = C bonds, dimerizations (particularly at C = C bonds) and chlorination (by displaced chlorine) all occurred radical mechanisms were thought to prevail. 

The exchange of halogen for fluorine with sulfur tetrafluoride, due to the high temperatures generally required, is of limited use. Carbon tetrachloride and carbon tetrabromide react with sulfur tetrafluoride at 225-325 C to give mixtures of halofluoromethanes, while hexachloro-ethane under similar conditions gives l,1.2,2-tetrachloro-l,2-difluoroethane (59%) as the main product.191... 

Incubation of l,l,2,2,-tetrachloro[l,2- 4C]ethane with a reconstituted monooxygenase system or with intact rat liver microsomes led to the formation of a metabolite capable of binding covalently to proteins and other nucleophiles. The only soluble metabolite detected upon incubation of 1,1,2,2-tetrachloroethane with a reconstituted system was dichloroacetic acid. Pronase digestion of the C-labcllcd microsomal proteins indicated the presence of several derivatized amino acids, which were hydrolysed by alkali to yield dichloroacetic acid. The results are consistent with biotransformation of 1,1,2,2-tetrachloroethane by cytochrome P450 to dichloroacetyl chloride, which can bind covalently to various nucleophiles or hydrolyse to dichloroacetic acid (Halpert, 1982). 

Ikeda, M. Ohtsuji, H. (1972) A comparative study of the excretion of Fujiwara reaction-positive substances in urine of humans and rodents given trichloro- or tetrachloro-derivates of ethane and ethylene. Br. J. ind. Med., 29, 99-104... 

A process in your company generates waste gases that need to be vented to the outside at a rate of 1 m3 per hour. In particular, you must be sure that the 1,1,2,2-tetrachloroethane present at 100 ppmv (i.e., 100 x 10 6 m3 of 1,1,2,2-tetrachloro-ethane vapor per m3 of total gas) will be removed from the gas-stream before discharge. Someone suggests you construct an adsorbent column filled with alumina (A1203) and run the gas through that column to capture the 1,1,2,2-tetrachloroet-hane. 

Most of the investigations into disproportionation reactions have mainly concentrated on chlorofiuoro derivatives of methane and ethane. When trichlorofluoromethane is refluxed with aluminum trichloride or aluminum tribromide, dichlorodifluoromethane and carbon tetrachloride are obtained. Dichlorofluoromethane yields chlorodifiuoromethane and chloroform chlorofiuoro derivatives of ethane and longer chain homologs exhibit a tendency towards isomerization as well as disproportionation, i.e. intramolecular halogen atom exchange. In this case, both types of reaction take place simultaneously. In other words, disproportionation of l,l,2-triehloro-1.2,2-trifiuoroethane (1) forms l,l,1.2-tetrachloro-2,2-difluoroethane (2) and... 

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