21. Reductive cleavage is only restricted to a handful of special substrates, such as ferrocene based hydrazones. 22. Reversible delithiation / lithiation of [ [ LiFePO4 | ] ] was successfully demonstrated using ferrocene derivatives. 23. Ferrocene can be introduced by heating with the hemicarcerand in a large bulky solvent such as tripiperidylphosphine oxide.24. The iron-containing deposits formed from ferrocene can form a conductive coating on the spark plug surfaces. 25. Thus, decamethylferrocene is much more easily oxidised than ferrocene and can even be oxidised to the corresponding dication. 26. With a molybdenum-ferrocene complex as catalyst, a turnover number of up to 226 could be achieved. 27. For non-aqueous work, IUPAC recommends the use of the ferrocene / ferrocenium couple as an internal standard. 28. As an example, figure 1 shows a 54-ferrocene dendrimer which was synthesized by a fast convergent approach. 29. Ferrocene can be sublimed in air at over 100 �C with no decomposition; metallocenes are generally purified by vacuum sublimation.30. Using planar chiral ferrocene ligands, enantiomeric excesses ( ee ) upward of 95 % have been observed in aryl couplings.
