Fluorination of Pentanes by Cobalt Trifluoride¹

Hydrocarbon Burning Velocities Predicted by Thermal Versus Diffusional Mechanisms1

“…Since activation energy is also involved in the temperature dependent part of equation (1), it is necessary to select a reasonable activation energy for the correlation. Limited experimental data which have been found on activation energies for low temperature hydrocarbon oxidation (ethane,6 propane,6 pentane6 and ethylene7 yield values from 38 to 42 kcal./mole.3 If a value of 40 kcal./mole is then assumed for the heat of activation of all hydrocarbon-air mixtures and K is taken as a constant, the relative values of burning velocity may be expressed by the following form of equation (1) V[O'(K} ti)'] [r»ir'4-96~B,fir,/(r, where ,)•] (1) Presented before the Division of Gas and Fuel Chemistry of the American Chemical Society, New York, N. Y.# September, 1951.…”

Halogenation

“…(23) Radzivanovskil, Ber., 28, 1135 (1895). (24) Sinnova ou Sadie, French Patent 954,945 (Jan. 3,1950).…”

Boiling Points and Boiling Point Numbers of Perfluoroalkanes and Perfluoroalkenes.

“…in K. = 540.87 log(3 + number of carbon atoms) -183.67 (2) Haszeldine and Smith (12) fit the boiling points of six linear perfluoroalkanes from n-C7FI6 to n-C12F26 adequately (average error, 0.7") with the Lautie (18) equation: (3) However, this equation is unsatisfactory for calculations of boiling points below that of n-CsF14. They also fit four monocyclic perfluoroalkanes with a second (12) equation and two bicyclic perfluoroalkanes with a third equation.…”

“…in °K. )2 = 15,400(number of carbon atoms) + 19,000 (3) However, this equation is unsatisfactory for calculations of boiling points below that of rc-C6Fi4. They also fit four monocyclic perfluoroalkanes with a second (12) equation and two bicyclic perfluoroalkanes with a third equation.…”