The selective functionalization of saturated hydrocarbons. Part 45. The effect of lower temperature on the rate and efficiency of formation of oxidized products in the Fe(III)-Fe(V) and Fe(II)-Fe(IV) manifolds

Article abstract of DOI:10.1016/S0040-4020(98)00907-7

In the Fe(III)-Fe(V) manifold the formation of the iron-carbon bond was found to be very fast, but the evolution to give ketone was slow at -20 °C and -40 °C. However, the efficiency at the latter temperature was good. The iron-carbon bond can be captured rapidly by F or by PhSeH. We have confirmed that either way to measure the iron-carbon bond gives essentially the same results. In contrast to the Fe(III)-Fe(V) manifold the reactions at -20 °C in the Fe(II)-Fe(IV) manifold are very fast for both iron-carbon bond formation and evolution to final products. In this manifold the reactions at -20 °C are more efficient than those at -5 °C.