1. For excellent recent reviews on ferrocene-based compounds, see: (a) A. Togni, T. Hayashi (Eds.), Ferrocenes: Homogeneous Catalysis – Organic Synthesis Materials – Science,VCH, Weinheim, Germany, 1995.
2. (b) A. Togni, R.L. Halterman (Eds.), Metallocenes, Wiley-VCH, Weinheim, Germany, 1998.
3. (c) N.J. Long, Metallocenes: A Introduction to Sandwich Complexes, Blackwell Science, Oxford, 1998.
4. (b) J.P. Launay, New J. Chem. 1 (1991) 97.
5. (a) A.C. Ribou, J.P. Launay, K. Takashashi, T. Nihira, S. Tarutani, C.W. Spangler, Inorg. Chem. 33 (1994) 1325.