1. For a recent overview see: (a) A. Togni, T. Hayashi, Ferrocenes, VCH, Weinheim, 1995.
2. Organometallic Compounds for Nonlinear Optics—The Search for En-light-enment!
3. (a) S. Borman, Chem. Eng. News, July 22 (1996), 38.
4. (b) A. Togni, Angew. Chem. Int. Ed. Engl. 35 (1996) 1475.
5. for references, see [1] chapter 2, [3] and, for example, some recent publications: (a) V.A. Soloshonok, A.D. Kacharov, T. Hayashi, Tetrahedron 52 (1996) 245. (b) Y. Nishibayashi, K. Segawa, H. Takada, K. Ohe, S. Uemura, J. Chem. Soc. Chem. Commun. (1996) 847. (c) A. Abiko, G.-Q. Wang, J. Org. Chem. 62 (1997) 6733. (d) A. Schnyder, A. Togni, U. Wiesli, Organometallics 16 (1997) 255. (e) A. Chesney, M.R. Bryce, R.W. Chubb, A.S. Batsanov, J.A.K. Howard, Tetrahedron Asym. 8 (1997) 2337. (f) T. Sammakia, E.L. Stangeland, J. Org. Chem. 62 (1997) 6104. (g) R. Kuwano, H. Miyazaki, Y. Ito, J. Chem. Soc. Chem. Commun. (1998) 71.