1. For recent reviews, see: (a) Beckwith, A.L.J.; Ingold, K.U. In Rearrangements in Ground and Excited States; de Mayo, P., Ed.; Academic: New York, 1980, pp 162–283.
2. Surzur, J-M. In Reactive Intermediates; Abramovitch, R.A., Ed.; Plenum: New York, 1981; vol. 2, Chapter 3.
3. Beckwith, A.L.J., Tetrahedron, 1981, 37, 3073 and references therein
4. Griller, D.; Ingold, K.U. Acc. Chem. Res. 1980,:13, 317.
5. Hart, D.J. Science, 1984, 223, 883.