| Popis: |
The naphthalene-cp-iron cation (cp cyclopentadienyl) has been studied polarographically under strictly aprotic conditions to prove the existence of the two-electron reduction product, the anion [C10H8FeC5H5]−. The reduction of the biphenyl- and benzene-cp-iron cations with sodium amalgam in proton donor media (pentane/water) is shown to yield, together with the electroneutral arene π-complexes AreneFeC5H5, the corresponding iron cyclohexadienyl-cp derivatives, endo-1-C6H5C6H6FeC5H5 and C6H7FeC5H5. The suggestion is made that the latter are formed from the two-electron reduction products, [AreneFeC5H5]−, under the action of protons. The [AreneFeC5H5]− anions cannot be detected in the reduction of [AreneFeC5H5]+ with sodium amalgam in aprotic media as these anions react with excess [AreneFeC5H5]+ to give two molecules of AreneFeC5H5. |
