Photochromism of [2.n]metacyclophan-1-ene derivatives (n=2,3,4) was investigated. The reaction rates of the thermal decoloration were increased about thousand-fold with increasing of n by one.
                                    研究了 [2.n]metacyclophan-1-ene 衍
生物(n=2,3,4)的光致变色作用。随着 n 的增大,热脱色的反应速率增加了约千倍。