Compared to long-chain alkyl iodides, cyclic alkyl iodides have obviously different characteristic of angular distributions which the value of anisotropy parameterfor I is bigger than that for I*.

• 与碘代直链烷烃相比，碘代环烷烃分子具有明显不同的角度分布特征，碘代环烷烃分子基态的值大于激发态。