A PRACTICAL and general synthesis for completely fluorina ted organic compounds was developed; it consists of reaction between cobalt trifluoride and vaporized hydrocarbons or fluorohydrocarbons at elevated temperatures. A number of pure fluorocarbons, ranging from perfluoron-butane to perfluorocetane, were produced and characterized.Certain reaction by-products were identified. Perfluoro-n-heptane was obtained in yields up to 78% from n-heptane, and perfluorodimethylcyclohexane in 88% yields from bis(trifluoromethyl)benzene. Crude yields for these two feed stocks were 91 and 97%, respectively.

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