... Contribution from the Department of Chemistry, Faculty of Science, Hiroshima University, Higashisenda-machi, Naka- ku, Hiroshima 730, Japan. ... 0002-7863/87/ 1509-5614$01.50/0 0 1987 American Chemical Society Page 2. ... us 470 W 458 0.6 470 s11(58), 37(15), JIO(~~) VI0 ...