1. 1) The authors wish to take this opportunity to express their gratitude for the donation of the Grant in Aid for Scientific Research from the Ministry of Education (for 1952).
2. 2) This work was presented at the 6th Annual General Meeting of the Chemical Society of Japan in Kyoto, April 5, 1953.
3. 3) T. Nozoe: Science Repts. Tohoku Univ., First Ser., 34, 199 (1950).
4. 4) a) W. von E. Doering and F. L. Detert: J. Am. Chem. Soc., 73, 876 (1951).
5. b) H. J. Dauben and H. J. Ringold: J. Am. Chem. Soc., 73, 876 (1951).