1.1- DI BROMOETHANE

Until It was banned in the United States in 1984 1 2 di bromoethane (ethylene dibromide orEDB)waspro duced on a large scale for use as a pesticide and soil fumigant... 

A(A -Bis(3-aminopiopyl)ethylenediamme is prepared by the method of E. K. Barefield. Six moles of 1,3-propanediamine is dissolved in 1.4 L of absolute ethanol and the solution is cooled to 5° in an ice bath. To this solution is added 0.75 mole of 1,2-di-bromoethane from a dropping funnel with vigorous stirring. After the addition is complete, the reaction is heated to reflux temperature for I A hours.. Potassium hydroxide, 150 g, is added and the mixture is refluxed for a further 1 hour. The reaction mixture is cooled to room temperature and filtered to remove the solids. The filtrate is evaporated to a sludge on a rotary evaporator and the semisolid is extracted several times with diethyl ether. The ether solution is evaporated until a viscous liquid remains. The liquid is distilled in vacuo (b.p. 138-148°/2 ton) and stored over potassium hydroxide pellets in a bottle protected from light. The yield is 64 g. 

Vinyl bromide s production and use as a flame retardant for acrylic fiber may result in its release to the environment through various waste streams. It may form in air as a degradation product of 1,2-di-bromoethane. Vinyl bromide was detected in fuma-roles and lava gas from volcanoes. If released into air, with a vapor pressure of 1030 mmHg at 25°C, vinyl bromide will exist in the gas phase. Gas-phase vinyl bromide will be degraded in the atmosphere by... 

One mode of control of nematodes living in the soil is the application of volatile soil fumigants, the vapours of which attain in the air space of the soil a concentration sufficient to Icill them. The major part of these substances can be classified among the aliphatic chlorinated hydrocarbons. Their action is aspecihc, so that they cannot be used during the active vegetative period because they damage plants. Their most important representatives are bromomethane (1), 1,2-di-bromoethane (2), a mixture of 1,3-dichloropropene (3) and 1,2-dichloropropane... 

Intense room-temperature phosphorescence was obtained with 1,2 di-bromoethane (0.6 M) as heavy-atom perturber. The phenomenon was observed with 18 PNA [192] and 16 azaaromatics containing one or two heterocyclic nitrogens [193]. The formation of a three-component complex, CD/aromatic/dibromoethane, in which the aromatic and the heavy-atom perturber are organized in a small space, is believed to be responsible for the phosphorescence emission. It was found that, concomitant with phosphorescence emission, the fluorescence of the included aromatic was quenched. It should be noted that, for most of the aromatics examined, a residual phosphorescence emission was found also in air-equilibrated solutions. 

Wong LCK, Winston JM, Hong CB, Plotnick H (1982) Carcinogenicity and toxicity of 1,2-di-bromoethane in the rat. Toxicol Appl Pharmacol 63 155-165... 

Treatment of 2-Iithio-l,3-dithianes with iodine, cupric salts, 1,2-di-bromoethane, or nitro compounds effects oxidative dimerization to give the dimer 72 plus a small amount of the 2-methylene derivative 73. 

We have found that bromination of polybutadiene can be readily achieved at low polymer concentration and at room temperature care must be taken that the somewhat less soluble H-H PVB does not precipitate at the end of the bromine addition. In order to prevent precipitation, cosolvents such as 10% of THF tetrahydrofuran or 1,2-di-bromoethane must be used. 

Acetone, bromoethane, butane, chloroethane, 2-chloropropane, 1,3-cyclopenta-diene, dibromodifluoromethane, 1,1-dichloroethane, 1,1-dichloroethene, 1,2-di-chloro-l,l,2,2-tetra luoroethane, diethylether, dimethoxymethane, dimethylpro-pane, 1,3-epoxypropane, ethyl formate, glyoxal, methyl acetate, methylbutane, methyl formate, methylpropane, -pentane, propanal. 

BRN 1912585, see Hexachlorobenzene BRN 1912384, see 2,4-Dinitrotoluene BRN 1913355, seep,p -DDE BRN 1914064, see Di-fl-butyl phthalate BRN 1914072, see p,p -DDD BRN 1915474, see Chlordane BRN 1915994, see Di-fl-octyl phthalate BRN 2049930, see Naled BRN 2051258, see Pindone BRN 2052046, see 2,6-Dinitrotoluene BRN 2054389, see 4,6-Dinitro-o-cresol BRN 2055620, see 2,4,5-T BRN 2057367, see Methoxychlor BRN 2059093, see Parathion BRN 2062204, see Benzyl butyl phthalate BRN 2215168, see Diuron BRN 2542580, see EPN BRN 2807677, see 2-Acetylaminofluorene BRN 3195880, see a-BHC BRN 3196099, see Camphor BRN 3910347, see cis-Chlordane, frans-Chlordane Brocide, see 1,2-Dichloroethane Brodan, see Chlorpyrifos Bromchlophos, see Naled Bromex, see Naled Bromic ether, see Ethyl bromide Bromobenzol, see bromobenzene 4-Bromobiphenyl ether, see 4-Bromophenyl phenyl ether 4-Bromodiphenyl ether, see 4-Bromophenyl phenyl ether p-Bromodiphenyl ether, see 4-Bromophenyl phenyl ether Bromoethane, see Ethyl bromide Bromofluoroform, see Bromotrifluoromethane Bromofume, see Ethylene dibromide Brom-o-gaz, see Methyl bromide Bromomethane, see Methyl bromide Bromomethyl chloride, see Bromochloromethane... 

The versatility of TOT in clathrate formation is further illustrated by the discovery of several other clathrate types belonging to various space groups PT (/raw-stilbene, cw-stilbene a-bromobutyric acid benzene ) Pl(PT) (methyl tran -cinnamate, methyl cw-cinnamate) P2 (weso-2,3-butanediol carbonate) P2j/c (weTO-2,3-di-bromobutane) C2jc (3-bromooctane ethyl a-bromobuty-rate ° ) Pbca (l,l,l-trifluoro-2-chloro-2-bromoethane) Pbcn (dl-2,3-dibromobu-tane) hexagonal R (a-chlorotetrahydropyran) The clathrates for which X-ray crystal structure determinations have been completed are indicated in Table 1. 

---