1. E. G. Rochow, J. Am. Chem, Soc. 69, 1729 (1947).
2. E. G. Rochow, J. Am. Chem. Soc. 70, 436 (1948).
3. A. D. Petrov, V. A. Ponomarenko, B. A. Sokolov, and G. V. Odabashyan, Bull. Acad. Sci. USSR, Div. Chem. Sic. 1947 (in the press).
4. R. West, H. Hunt, and R. O. Whipple, J. Am. Chem. Soc. 76, 310 (1954).
5. V. A. Ponomarenko and V. F. Mirohov, Proc. Acad. Sci. USSR 94, No. 3, 485 (1954).