1. Y. Chauvin, S. Einloft and H. Olivier, Ind. Eng. Chem. Res., 34 (1995) 1149; Y. Chauvin, B. Gilbert and I. Guibard, J. Chem. Soc., Chem. Commun., (1990) 1715.
2. B. Cornils, Angew. Chem., Int. Ed. Engl., 34 (1995) 1575; W.A. Herrmann and C.W. Kohlpaintner, Angew. Chem., Int. Ed. Engl., 32 (1993) 1524.
3. B. Cornils, J. Hibbel, W. Konkol, B. Lieder, J. Much, V. Schmid and E. Wiebus (Ruhrchemie AG), Patent No. DE B 3 234 701 (1982);
4. Chem. Abstr., 100 (1984) 198449c.
5. W. Keim, Chem. Ing. Techn., 56 (1984) 850.