1978 年 98 巻 4 号 p. 550-553
The conformation of calcium ketyl radicals derived from (1-naphthalenyl) phenylmethanone and (2-methyl-1-naphthalenyl) phenylmethanone was examined from electron spin resonance spectra. The phenyl and carbonyl groups were coplaner and the twisting angle about the C-C bond connecting naphthyl and carbonyl was found to be 26°at room temperature and 46°at -20°. The twisting angle of the radical was smaller than that of a neutral molecule.