Bromine-carbon

Brominated C rbon te Oligomers. There are two commercial brominated carbonate oligomer (BrCO) products. Both are prepared from tetrabromobisphenol A and phosgene. One has phenoxy end caps [28906-13-0] and the other trihromophenoxy [71342-77-3] end caps. These are used primarily in PBT and polycarbonate/acrylonittile—butadiene—styrene (PC/ABS) blends. 

Neutral HX addition X = P, S, Se, Si Allylic bromination Carbon-halogen addition... 

Violent reactions have occurred between ozone and many chemicals, a small selection being acetylene, alkenes, dialkyl zincs, benzene/rubber solution, bromine, carbon monoxide and ethylene, diethyl ether, hydrogen bromide, and nitrogen oxide. 

Brominated butyl rubber, 4 436 development of, 4 434 manufacture, 4 400, 442—444 Brominated carbonate oligomers,... 

For comparison, fluorous-phase-soluble Pd complexes are only 74-98% selective towards the trans product [168-170]. The isolated yields of the product approached 70% when a threefold excess of olefin to iodobenzene was used (Table 3) however, the percent yield decreased with the use of bromobenzene as expected since activation of bromine-carbon bonds is less favorable than iodo-carbon bonds. It was also possible to catalyze the reaction in the absence of additional triethylamine base (Table 3). In this case, the tertiary amines of the den-drimer most likely act as the base. The catalysts, in general, were fully recover-... 

Benzyl chloride. Sodium cyanide. Ethyl alcohol. Liquid bromine. Carbon tetrachloride. Sodium hydroxide. Sodium sulfate. Chloroform Sulfuric acid. Bromine, Sodium cyanide Sodium hydroxide. Sodium cyanide. Bromine, Sulfuric acid Acetone, Sulfuric acid. Bromine, Methylene chloride Liquid bromine. Chlorine, Nitromethane, Carbon tetrachloride. 

Sec also Bromine Carbon Chlorine Chlorinated Organics Fluorine Halogen Group anil Iodine. 

The antiviral activity of 322, determined351 using primary rabbit kidney cells injected with HS V-l (Herpes Simplex Virus type 1), showed that BVFRU has antiviral potency and transport characteristics suitable for in vivo diagnosis of HSE (Herpes Simplex Encephal-ities) because of greater stability of bromine-carbon bonds than iodine-carbon bond present in [131I]IVDU352, [( )-5-(2-iodovinyl)-l-(2-deoxy- -D-ribofuranosyl)uracil]. 

Bromine, carbon dioxide, helium, steel, air, oil, marble, copper, water, sand, tin, bronze, mercury, salt. 

Consider now the structure of bromochloromethane, structure 4-7. Careful inspection will reveal the presence of a a plane containing the bromine, carbon, and chlorine atoms and bisecting the H-C-H angle ... 

Oxidizer, Poison, Corrosive SAFETY PROFILE Poisonous and corrosive. Very reactive, a powerful oxidizer. Explosive or violent reaction with organic materials, water, acetone, ammonium halides, antimony, antimony trichloride oxide, arsenic, benzene, boron, bromine, carbon, carbon monoxide, carbon tetrachloride, carbon tetraiodide, chloromethane, cobalt, ether, halogens, iodine, powdered molybdenum, niobium, 2-pentanone, phosphoms, potassium hexachloroplatinate, pyridine, silicon, silicone grease, sulfur, tantalum, tin dichloride, titanium, toluene, vanadium, uranium, uranium hexafluoride. 

See also Bromine Carbon Tetrabromide Ethyl Bromide Methanol. 

Indicate the stereochemical structure of this three-membered species, and also indicate the direction of any polarisation that might exist along the bromine/carbon bonds. 

Sea water is a very complicated solution of many substances. The main dissolved component of sea water is sodium chloride, common salt. Besides sodium and chlorine, the main elements in sea water are magnesium, sulfur, calcium, potassium, bromine, carbon, nitrogen, and strontium. Together these 10 elements make up more than 99% of the dissolved materials in the oceans. In addition to sodium chloride, they combine to form such compounds as magnesium chloride, potassium sulfate, and calcium carbonate (lime). Animals absorb the latter from the sea and build it into bones and shells. 

In the case of 2,3-dichloro-l,l-dimethylcyclopropene, addition of bromine/carbon tetrachloride to a solution of the cyclopropene in diethyl ether at — 90 to — 95 °C gave both cis-and /rfl .v-addition products in a 3 2 ratio (78%). Addition of bromine to 2-bromo-3-chloro-1,1-dimethylcyclopropene also occurred at low temperatures to give the corresponding cyclopropane (60%). °... 

Trimethylbicyclo[4.1.0]heptan-2-one (33) and its 35-epimer 35 reacted with hydrogen bromide to give the same product 34 in which the C1-C7 bond was cleaved to give the tertiary bromide. This was subsequently reduced with lithium in liquid ammonia due to the lability of the bromine-carbon bond. ... 

The partial pressure of bromine over a bromine-carbon tetrachloride solution containing mole fraction of bromine equal to 0.025 is 10.27 torr. If the vapour pressure ofpure bromine at the same temperature is 213 torr. The activity coefficient of bromine in the given solution ... 

Benzyloxynitromethane is a useful reagent in the synthesis of the precursors of some / -lactam antibiotic molecules. The nitrovinyl thioether (42.8) and others are thus synthesized, and may be cyclized with tetrabutylammonium fluoride, ozone and DBU (review of the chemistry of DBU [3364]. 2-Vinyl-thiopyridine forms a fused thiazolium ring on stirring with bromine-carbon tetrachloride [2811]. 

N.m.r. spectroscopy has been used extensively in the structural elucidation of halogenated monoterpenoids e.g. refs. 424,426,427) two further papers which report useful data concern C n.m.r. y-effects and the differentiation of some brominated carbons from chlorinated carbons due to shortened C n.m.r. spin-relaxation times and reduced values of nuclear Overhauser enhancement. 

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