Carbon bromide

The presence of other oxidant-consuming constituents in the feed water, such as iron, natural organic carbon, carbonates, bromide, and other contaminants, may require pretreatment of the feed stream, additional oxidant dosage, or more contact time to adequately destroy the MTBE and other oxygenates. 

SYNS BROMID UHUCITY D CARBON BROMIDE METHANE, TETRABROMIDE METHANE, TETRABROMO- TETRABROMIDE METHANE TETRABROMOMETHANE... 

The Principal Compounds of Potassium are the chlorate, chloride, hydroxide, nitrate, carbonate, bromide, and iodide. 

In the case of o-deuterio/>/ owobenzenc, on the other hand, breaking of the weaker carbon-bromide bond (step 2) is much faster than the protonation by ammonia (reverse of step 1) as fast as a carbanion is formed, it loses bromide ion. In this case, isotopic exchange is not important. (It may even be that here steps (I) and (2) are concerted.)... 

Synonyms Carbon bromide Tetrabromide methane Tetrabromo methane... 

The synonyms of carbonyl bromide fluoride include carbonic bromide fluoride (ACS nomenclature), carbonyl bromofluoride, carbon oxybromide fluoride and bromofluorophosgene. The lUPAC name is carbonyl bromide fluoride. The Chemical Abstracts Registry number for COBrF is [753-56-0]. 

Carbon bromide fluoride is formed in a flow system with a yieid of 30% when a mixture of dinitrogen (saturated with dibromine), molecular fluorine, and carbon monoxide are passed simultaneously through a copper tube [1751]. No further details of this preparation are available, but if it is probably consistent with the stoicheiometry shown in Equation (16.7). 

So far, we have focused our discussion on the relative nucleophilicities of natural nucleophiles. Let us now consider how certain structural features of the organic molecule (i.e., type of leaving group, type of carbon skeleton) determine the kinetics of nucleophilic substitution. In Table 3, the (neutral) hydrolysis half-lives are given for various monohalogenated compounds at 25°C. Also indicated are the postulated reaction mechanisms with which these compounds undergo SN reactions. As can be seen from Table 3, the carbon-bromide and carbon-iodine bonds hydrolyze fastest, about one to two orders of magnitude... 

CARBON BROMIDE (558-13-4) Violent reaction with fluorine, hexylcyclohexyldilead, oxygen, potassium, potassium acetylene-1,2-dioxide, sodium azide, uranium(III) hydride. Mixtures with finely divided aluminum, lithium, magnesium, potassium-sodium alloy, titanium, zinc can form a friction- or shock-sensitive explosive material. Incompatible with decaborane. Attacks active metals. 

Br bond originated from the head-to-head chain propagation (i) was also found in the polymer. Based on the integration ratio of peak g and peak b, 89% of terminal bromide was found to be preserved. The number average molecular weight of PVAc was estimated to be 4230 from the integration of peak f and peak b, which is very close to the value (4500) measured by GPC. The presence of the terminal carbon-bromide group further proved that the VAc polymerization by the catalyst of CuBr/tPy was an ATRP process. 

Synonyms/Trade Names Carbon bromide. Methane tetrabromide, Tetrabromomethane... 

The hydroxamate moiety can be oxidized by other radicals such as N3, CO3 , Bra or CIO2 formed upon OH reaction with azide, carbonate, bromide, or chlorate ions, respectively. These oxidizing radicals are more selective than OH and are useful when the R group is susceptible for oxidation, e.g., OH readily adds to the aromatic group of SAHA (Scheme 1), whereas N3, C03, or Bra oxidize it slowly, if at all (48). 

Carbon bromide. See Carbon tetrabromide Carbon chloride. See Carbon tetrachloride Carbon chlorosulfide. See Thiophosgene Carbon dichloride. See Perchloroethylene Carbon dichloride oxide. See Phosgene Carbon dioxide... 

Synonyms Carbon bromide Methane tetrabromide Tetrabromomethane... 

During their study on 6-exo-trig radical cyclizations of axially chiral a-halo-ortho-alkenyl anihdes, Curran and coworkers [40] prepared the tricyclic amide 93/94 in moderate yield (49-51%) and excellent chirality transfer (98-99%) via a 6-exo-trig/5-exo-trig sequence (Scheme 5.20). The reaction was proposed to be initiated by an attack at the carbon-bromide bond with BujSnH, providing a-amidyl radical 97 (Scheme 5.21). 

When the 1,2-dibromoethylene complex Fe(CO)4(c/ -CHBr=CHBr) is subjected to photolysis, the insertion of iron(O) into a carbon bromide bond is observed, leading to the formation of the vinyl complex Fe2(CO)6Br(CH=CHBr) (Ref. 124) ... 

Under these conditions, several 5-halofuranosides and 6-halopyranosides ring-opened to the corresponding pent-4-enals and hex-5-enals, respectively [16,17]. Mechanistically, the Bernet-Vasella reaction proceeds via oxidative insertion of zinc into the carbon-bromide bond, followed by reductive elimination with the loss of methoxide to give the aldehyde product (Scheme 3.2) [18]. 

In the following, it is essential to have the hydrobromic add hot before conunencing the addition of the carbonate bromide. This avoids the formation of any cis product. The use of carbonate chloride in lieu of the bromide leads to a product which consistently contains a 5% chloride impurity. This contaminant, rrans-[Co(en)jBr Cl] Br, is not removed by recrystallization. 

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