Bromine with ethane

An alirraative course for the reaction of bromine with ethane couM result in tbe formation of bromomethane. ... 

These predictions are correct. Treatment of ethylbenzene with nitric acid and sulfuric acid, for instance, introduces a nitro group into the ring treatment with bromine in the presence of light introduces a bromine atom into the side chain. But because of the ethyl group, nitration takes place more readily than with benzene itself, and occurs chiefly at the positions ortho and para to the ethyl group and because of the ring, bromination takes place more readily than with ethane, and occurs exclusively on the carbon nearer the ring. Thus each portion of the molecule affects the reactivity of the other portion and determines the orientation of attack. 

Why does bromine react rapidly with ethene at room temperature but only slowly with ethane ... 

Impurities in recoil systems present much the same problem as in any other chemical system. Their presence is perhaps a bit more serious in recoil work, particularly in gas-phase studies. This can be illustrated by a siiecific example. In studying the effect of perdeuteration on product yield from the reaction of carbon-11 with ethane, it was found that the ethylene- C yield tended to be erratic. A standard method of preparation of ethaiie-dg involves the reduction of ethylene-d4 with deuterium. Traces of ethylene remaining are removed by treatment with bromine, a most effective method. The removal of bromine is accomplished by the usual techniques and is continued until its presence can no longer be detected. Under the circumstance in question it meant that the mole fraction of bromine in the mixture was less than 10 . In the same system, ethylene- C was produced at a concentration of about 10 mole fraction. The trace of bromine remaining was sufficient to scavenge part of the labeled ethylene. The problem was readily solved by using another method of purification. 

Halons (I.e. BCF and BTM) are compounds of fluorine, chlorine and/or bromine with hydrocarbons such as methane and ethane their extinguishing action is also due to negative catalysis. ... 

Bromine reacts with ethane by a free radical mechanism. Write the steps of this mechanism. 

Bromine can react with ethane to form bromoethane. a What conditions are needed for the reaction between ethane and bromine to take place b What do we call this type of reaction c Write an equation to show the reaction of ethane and bromine to form bromoethane. d Why is this reaction not a good way to prepare a pure sample of bromoethane e i Name the three steps in the mechanism of... 

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. 

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... 

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. 

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