近二十年来,有机化学的迅速发展,使它已开始进入了深入到探求微观粒子的运动和有机反应方向间关系的高度水平。这一发展的最突出的标志,就是 Woodward-Hoff-mann 规则的出现。这一被称为“分子轨道对称守恒原理”的规则,从微观粒子的运动和分子轨道的变化出发,阐明了虽然长期已为有机化学家们掌握但却无从解释的若干实验 In the recent two decades, the rapid development of organic chemistry has led it to enter a high level of exploration into the relationship between the movement of micro-particles and the direction of organic reactions. The most prominent symbol of this development is the emergence of the Woodward-Hoff-mann rule. This rule known as the “principle of conservation of molecular orbital symmetry”, starting from the movement of the microparticle and the change of the molecular orbit, illustrates that although experiments have long been unconscionable for organic chemists,