Abstract
It is clarified by performing X-ray structure analysis that the crystal structure of [Ru(bpy)3]2[Cr(CN)6]CI·8H2O (bpy = 2,2′-bipyridine) is the same as that of [Os(bpy)3]2[Cr(CN)6]Cl·8H2O. The difference of energy transfer rate from [M(bpy)3]2+ (M=Ru2+ or Os2+) to [Cr(CN)6]3- in pure crystals of double complex salts ([M(bpy)3]2[Cr(CN)6]Cl·8H2O) is discussed in terms of the spectroscopic characters and lifetimes of the salts.