Ethylene bromide, reaction with potassium

Alkyl fluorides have been prepared by reaction between elementary fluorine and the paraffins, by the addition of hydrogen fluoride to olefins, by the reaction of alkyl halides with mercurous fluoride, with mercuric fluoride, with silver fluoride, or with potassium fluoride under pressure. The procedure used is based on that of Hoffmann involving interaction at atmospheric pressure of anhydrous potassium fluoride with an alkyl halide in the presence of ethylene glycol as a solvent for the inorganic fluoride a small amount of olefin accompanies the alkyl fluoride produced and is readily removed by treatment with bromine-potassium bromide solution. Methods for the preparation of alkyl monofluorides have been reviewed. ... 

Bromoethylamine hydrobromide has been prepared by the reaction of potassium phthalimide with ethylene bromide, followed by hydrolysis,1 by the addition of hydrogen bromide to ethyleneimine,2 and by the present method.3... 

The reaction between ethylene bromide and potassium iodide in 99% methanol (inert) has been found to be first-order with respect to each reactant (second-order overall) (Dillon, 1932). The reaction can be represented by C2liiBr2 + 3K1 —> C2H4 + 2KBr + KI3 or A + 3B - products. 

R. T. Dillon (1932) studied the reaction between ethylene bromide and potassium iodide in 99% methanol with the following data ... 

According to the original process of Addor (1962), phospholan is prepared by the reaction of ethylene-1,2-dithiol with cyanogen chloride, followed by the reaction of 2-imino-l,3-dithiolane (103) with diethyl phosphorochloridate. According to his later process (1970), N-(0,0-diethylphosphoryl) dithiocarbamate (104), obtained by the addition reaction of diethyl phosphoryl isothiocyanate and potassium hydrosulilde, is cyclised with ethylene bromide. 

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