Rates of oxidation and gum formation for six hydrocarbons, three jet turbine fuels and three diesel fuels have been measured at 100 °C in the presence of f-Bu202 as initiator. Four of the six fuels oxidize faster at 100 °C than in previous work at 130 °C without initiator. For any single substrate, the amount of gum produced for the oxygen absorbed is similar at 100 and 130 °C, even with large changes in rates and f-Bu202 concentrations. Thus, one mechanism of gum formation is intimately associated with oxidation. The effects of f-Bu202 concentration on the rates of oxygen absorption and gum formation show that gum formation is associated with chain termination by two peroxy radicals. In general, the pure hydrocarbons have long kinetic chains and give good yields of hydroperoxides. The fuels give short kinetic chains and produce little hydroperoxide but much gum for the oxygen absorbed. Another mechanism of gum formation is the coupling of substrates by peroxides in the absence of oxygen. The mechanism, condensation of oxidation products from alkylnaphthalenes, is also proposed.

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Die Aerosol‐Fluorierung der Glykolether(I) mit elementarem Fluor in einem bereits früher beschriebenen Reaktor liefert die perfluorierten Analoga (II) in isolierten Ausbeuten von 36%, 22%, 30% und 15%.