1. P.R. Brown, F.G.N. Cloke and M.L.H. Green, J.C.S. Chem. Commun. 1126 (1980).
2. S. Datta, M.B. Fischer and S.S. Wreford, J. Organomet. Chem. 188: 353 (1980).
3. R.P. Beatty, S. Datta and S.S. Wreford, Inorg. Chem. 18: 3139 (1979).
4. H. Yasuda, Y. Kagihara, K. Mashima, K. Lee and A. Nakamura, Chem. Lett. 519 (1981).
5. G. Erker, J. Wicher, K. Engel, F. Rosenfeldt, W. Dietrich and C. Kruger, J. Am. Chem. Soc. 102: 6344 (1980).