Hydrogen fluoride fluorination

Representing a two electron covalent bond by a dash (—) the Lewis structures for hydrogen fluoride fluorine methane and carbon tetrafluoride become... 

Hydrogen fluoride Fluorine Methane Carbon tetrafluoride... 

The addition of lithium fluoride, due to its solubility in a fluorine bath, can suppress the occurrence of the anode effect.2 Nakajima and co-workers reported that the carbon/hydrogen fluoride/fluorine system formed the graphite fluoride intercalation compound C4F as a solid... 

Redox reactions that have a positive reaction free energy are not spontaneous, but electricity can be used to make them occur. For example, there is no common spontaneous chemical reaction in which fluorine is a product, so the element cannot be isolated by any common chemical reaction. It was not until 1886 that the French chemist Henri Moissan found a way to force the formation of fluorine by passing an electric current through an anhydrous molten mixture of potassium fluoride and hydrogen fluoride. Fluorine is still prepared commercially by the same process. 

For the safe handling of hydrogen fluoride, fluorine/helium. and trifluoromethyl hypo-fluorite the use of a specific apparatus has been proposed (Figure 1). 

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