Catalytic hydrogenation of [7]paracyclophane results in absorption of only two moles of hydrogen to give the olefin 1. Resistance to further hydrogenation and MM2 calculations show that 1 is a member of the class of hyperstable olefins. The structure of 1 is secured by both spectroscopic and chemical means.
[7]对环环烷的催化氢化仅吸收2摩尔氢即可得到烯烃1。对进一步氢化的抗性和MM2计算表明1是超稳定烯烃类的一员。1的结构通过光谱和
化学方法固定。