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

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 -2 0 degrees C and -40 degrees C. However, the efficiency at the latter t emperature was good. The iron-carbon bond can be captured rapidly by I - or by PhSeH. We have confirmed that either way to measure the iron-c arbon bond gives essentially the same results. In contrast to the Fe-I II-Fe-V manifold the reactions at -20 degrees C in the Fe-II-Fe-IV man ifold are very fast for both iron-carbon bond formation and evolution to final products. In this manifold the reactions at -20 degrees C are more efficient than those at -5 degrees C. (C) 1998 Elsevier Science Ltd. Ali rights reserved.