1. 1) A part of the present experiments was read as a paper before the 5th Regular Meeting of the Institute of Nonaqueous Chemistry on November 7, 1953.
2. 2) T. Nozoe, Y. Kitahara, T. Andô, and S. Masamune: Proc. Japan Acad., 27, 415 (1951). T. Nozoe, Y. Kitahara, S. Masamune, and K. Yamaguchi: Proc. Japan Acad., 28, 85 (1952). T. Nozoe, Y. Kitahara, T. Andô, S. Masamune, and H. Abe: Sci. Rep. Tohoku Univ., First Ser., I, 36, 166 (1952).
3. 3) H. J. Dauben and H. J. Ringold: J. Am. Chem. Soc., 73, 876 (1951).
4. 4) B. J. Abadir, J. W. Cook, J. D. Loudon, and D. K. V. Steel: J. Chem. Soc., 1952, 2350.
5. 5) W. von E. Doering and L. H. Knox: J. Am. Chem. Soc., 74, 5683 (1952).