... in: H. Sigel (Ed.), Metal Ions in Biological Systems, 19Dekker, New York (1985), pp. 81–108 and references cited therein. 3; Kittaka, A.; Sugano, Y.; Otsuka, M.; Ohno, M.; Sugiura, Y.; Umezawa, H. Preceding paper of this issue. 4; A. Streitwieser Jr. Molecular Orbital Theory for Organic ChemistsJohn Wiley & Sons, Inc, New York (1961). 5; ... 6; M. Otsuka, A. Kittaka, T. Iimori, H. Yamashita, S. Kobayashi, M. Ohno; Chem. Pharm. Bull., 33 (1985), p. 509. ...