1) Y. Oosawa, T. Miyamoto, T. Saito, and Y. Sasaki, Chem. Lett., 1975, 33.
2) Y. Oosawa, T. Saito, and Y. Sasaki, Chem. Lett., in press.
3) H. Takahashi, Y. Oosawa, A. Kobayashi, T. Saito, and Y. Sasaki, Abstracts 1C–05, The 25th Symposium on Coordination Chemistry (Sakuen Kagaku Tôronkai), Tokyo, 1975.