1. 1) This work was presented at the Yamagata Local Meeting of the Chemical Society of Japan, October 6, 1955, and at the 9th Annual Meeting of the Chemical Society of Japan, April 5, 1956.
2. 2) P. Akroyd, R. D. Haworth, and P. R. Jefferies: J. Chem. Soc., 1954, 286.
3. 3) T. Nozoe, S. Ebine, S. Ito, and A. Konishi: Proc. Japan Acad., 27, 10 (1951).
4. 4) T. Nozoe, S. Setô, M. Sat, and T. Katôno: Science Repts. Tohoku Univ., First Ser., 37, 191 (1953).
5. 5) Cf. P. L. Pauson: Chem. Rev., 55, 9 (1955).