Certain Gases Containing Fluorine

A certain sample of uranium is reacted with fluorine to form a mixture of 235UF< (g) and 238UF< (g). After 100 diffusion steps the gas contains 15 2 6 23SUF< molecules per... 

Unlike ECF, direct fluorination does not alter the carbon backbone preparation of isomerically pure acids is possible (18). Both direct fluorination and ECF permit a great variety of stmctures to be made, but each method is better at certain types of stmctures than the other. Ether acids are produced in good yields, by direct fluorination (17), while ECF of ether-containing acids is fair to poor depending on the substrate. Despite much industrial interest, the costs and hazards of handling fluorine gas have prevented commercial application of this process. 

Various fluorine compounds, such as xenon(II) fluoride, act under certain conditions (irradiation, gas-phase reaction) as radical fluorinating agents. Electrochemical fluorinations (see Section 7.) carried out in hydrogen fluoride containing systems (ref 7, pp73-76) are further examples of radical-type reactions. 

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