Ethane bromination

Bis(tribromophenoxy)ethane Brominated epoxy Zinc oxide Zinc borate 9 8 15.7 11.5... 

Lorkovic, I., Yilmaz, A., Yilmaz, G., et al. (2004). A Novel Integrated Process for the Functionalization of Methane and Ethane Bromine as Mediator, Catal Today, 98, pp. 317-322. 

The relative rates of reaction of ethane toluene and ethylbenzene with bromine atoms have been measured The most reactive hydrocarbon undergoes hydrogen atom abstraction a million times faster than does the least reactive one Arrange these hydrocarbons in order of decreasing reactivity... 

In the presence of catalysts, trichloroethylene is readily chlorinated to pentachloro- and hexachloroethane. Bromination yields l,2-dibromo-l,l,2-trichloroethane [13749-38-7]. The analogous iodine derivative has not been reported. Fluorination with hydrogen fluoride in the presence of antimony trifluoride produces 2-chloro-l,l,l-trifluoroethane [75-88-7] (8). Elemental fluorine gives a mixture of chlorofluoro derivatives of ethane, ethylene, and butane. 

Example 12.1. Calculate the enthalpy for each step in the bromination of ethane b>... 

A kinetie study of a reaetion ean be simplified by running the reaetion with one or more of the eomponents in large exeess, so that the eoneentration remains effeetively eonstant. Me Tigue and Sime [2] eonsider the oxidation of aliphatie aldehydes sueh that ethanal with bromine in aqueous solution follows seeond-order kineties ... 

Biphenylcarboxylic acid [[1,1 -Biphenyl] -2-carboxylic acid], 83 Boron tnfluonde, etherate, [Borane, tri-fluoro-, compd. with l,l -oxybis-[ethane] (11)], 10 Bromine, 108... 

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... 

Particularly the chlorinated compounds have enjoyed range of applications vinyl chloride (chloro-ethene) as monomer for the production of PVC, tetra- and trichloroethenes as solvents for degreasing, and the insecticides l,l,l-trichloro-2,2-bis(p-chlorophenyl)ethane (DDT) and isomers of hexachlorocyclohexane (HCH) (benzene hexachloride). The biodegradation of fluorinated aliphatic compounds is generally different from the outlines that have emerged from investigations on their chlorinated, brominated, and even iodinated analogues. They are therefore treated separately in Part 4 of this chapter. 

Purification of industrial oils, kerosene/jet fuel, lubricating oils Mono- dicumyldiphenylamine Mono- dioctyldiphenylamine Dimer fatty acids Purification of xylenes Improvement of bromine number of recycle cumene in phenol plants Improvement of bromine number of recycle ethylbenzene in styrene plants based on liquid pha.se oxidation Alkylation of xylenes with diisobutylenes to mono-/ rr-butyI derivatives Phenyl xylyl ethane... 

Methane, ethane, and other alkanes react with fluorine, chlorine, and bromine. 

In a rather remarkable reaction, methylene groups activated by two electron-withdrawing substituents react with non-activated alkenes under soliddiquid phase-transfer conditions in the presence of a molar equivalent of iodine to yield cyclopropane derivatives (Scheme 6.29) [62, 63], The reaction fails, when the catalyst is omitted or if iodine is replaced by bromine or chlorine. The intermediate iodomethylene systems are unstable in the absence of the reactive alkene and dimerize to produce, for example, ethane-1,1,2,2-tetracarboxylie esters and ethene-1,1,2,2-tetracarboxy lie esters. 

In this structure, five halogen atoms— three fluorines, one chlorine, and one bromine atom— replace five of the six hydrogen atoms of ethane. 

Ambient air sampling on plant property of industrial bromine extraction and bromo-organics synthesis facilities revealed the presence of tetrabromobisphenol A (N.D. —28 ng/m ), decabromobiphenyl ether (N.D. —72 ng/m3), tris(2,3-dibromopro-pyljphosphate (N.D. —60 ng/m3) and l,2-bis(tribromophenoxy)ethane (N.D. —183 ng/m3). 

By a two-fold bromine-lithium exchange on l,2-bis(2-bromo-3,5-di-f-butylphenyl)-ethane (73), Yoshifuji and coworkers were able to generate 1,6-dilithium compound 74 . The reaction was carried out using n-butyllithium in THF at — 78°C (Scheme 26). 

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